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Nunes T, Ribeiro R, Almiro PA, Fontes R, Machado R, Abreu J, Corte-Real A. Orofacial assessment as digital path for forensic and legal evidence record. Forensic Sci Res 2024; 9:owae006. [PMID: 39006155 PMCID: PMC11240156 DOI: 10.1093/fsr/owae006] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 12/18/2023] [Indexed: 07/16/2024] Open
Abstract
In forensic scenarios, such as armed conflicts or mass disasters, the oral cavity can be a valuable source of identification information relevant to legal issues. In many European Union countries, it is mandatory to register dental records for identification purposes. A pilot and quasi-experimental study was performed. The study aims to analyze two methodologies, photography and wireless intraoral (IO) laser scanner, in the scope of the orofacial record in forensic pathology, highlighting their impact on human identification. The IO scanner i700 (Medit, Lusobionic, Portugal) and Canon 5D-Full Frame equipment were used to record the individual status, living patients (n = 5), and forensic cases (n = 5). IO and extraoral anatomical structures were recorded following six parameters: time, mineralized and soft detail, communication, extra devices, and distortion. The statistical analysis was performed in accordance with a scoring system and Mann-Whitney (P < 0.05) analysis. The photography method recorded extraoral data for all samples (score range between 15 and 23). The time elapsed to complete an IO scan in forensic cases was shorter than with photography, without requiring additional sources of light or mirror devices. Living patients and corpses identified statistically significant differences. It can be concluded that laser scanners are a valuable tool in the field of forensic pathology and can be used to record and analyze anatomic-morphological data for identification purposes accurately. Key points Human identification engages in orofacial details records.Photographic and laser scans record intraoral and extraoral anatomic structures.Forensic cases assessed by intraoral scanner technology are accurate and less time-consuming, optimizing the orofacial data for identification.
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Affiliation(s)
- Tiago Nunes
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Rita Ribeiro
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Pedro A Almiro
- Center for Research in Psychology, Autonomous University of Lisbon, Lisbon, Portugal
| | - Rebeca Fontes
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Ricardo Machado
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - João Abreu
- Clinical and Academic Centre of Coimbra, Coimbra, Portugal
| | - Ana Corte-Real
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
- Laboratory of Forensic Dentistry, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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Tino R, Roach MA, Fuentes GD, Agrawal A, Zaid M, Cooper DJ, Bajaj N, Lin R, Xiao L, Mayo LL, Wiederhold LR, Shah SJ, Tate MK, Chronowski GM, Reddy JP, Mezera M, Mann JM, Augspurger M, Otun AO, Chambers MS, Koay EJ. Development and clinical implementation of a digital workflow utilizing 3D-printed oral stents for patients with head and neck cancer receiving radiotherapy. Oral Oncol 2024; 157:106944. [PMID: 39024700 DOI: 10.1016/j.oraloncology.2024.106944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 07/09/2024] [Indexed: 07/20/2024]
Abstract
OBJECTIVES We describe the development of 3D-printed stents using our digital workflow and their effects on patients enrolled in the lead-in phase of a multi-center, randomized Phase-II trial. MATERIALS AND METHODS Digital dental models were created for patients using intraoral scanning. Digital processes were implemented to develop the mouth-opening, tongue-depressing, and tongue-lateralizing stents using stereolithography. Time spent and material 3D-printing costs were measured. Physicians assessed mucositis using the Oral Mucositis Assessment Scale (OMAS) and collected MD Anderson Symptom Inventory (MDASI) reports and adverse events (AEs) from patients at various time points (TPs). OMAS and MDASI results were evaluated using paired t-test analysis. RESULTS 18 patients enrolled into the lead-in phase across 6 independent clinical sites in the USA. 15 patients received stents (average design and fabrication time, 8 h; average material 3D-printing cost, 11 USD). 10 eligible patients with complete OMAS and MDASI reports across all TPs were assessed. OMAS increased significantly from baseline to week 3 of treatment (mean difference = 0.34; 95 % CI, 0.09-0.60; p = 0.01). MDASI increased significantly from baseline to week 3 of treatment (mean difference = 1.02; 95 % CI, 0.40-1.70; p = 0.005), and week 3 of treatment to end of treatment (mean difference = 1.90; 95 % CI, 0.90-2.92; p = 0.002). AEs (grades 1-3) were reported by patients across TPs. Mucositis and radiation dermatitis were primarily attributed to chemoradiation. CONCLUSIONS 3D-printed stents were successfully fabricated and well tolerated by patients. As patients enroll in the randomized phase of this trial, data herein will establish a baseline for comparative analysis.
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Affiliation(s)
- Rance Tino
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA
| | - Millicent A Roach
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA
| | - Gabriela D Fuentes
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA
| | - Anshuman Agrawal
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA
| | - Mohamed Zaid
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA
| | - Dylan J Cooper
- Department of Otolaryngology, Head and Neck Surgery, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY 11550, USA
| | - Nimit Bajaj
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA
| | - Ruitao Lin
- Department of Biostatistics, Division of VP, Research, The University of Texas MD Anderson Cancer Center, 7007 Bertner Avenue, Houston, TX 77030, USA.
| | - Lianchun Xiao
- Department of Biostatistics, Division of VP, Research, The University of Texas MD Anderson Cancer Center, 7007 Bertner Avenue, Houston, TX 77030, USA.
| | - Lauren L Mayo
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center League City, League City, TX 77573, USA
| | - Lee R Wiederhold
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center League City, League City, TX 77573, USA
| | - Shalin J Shah
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center Sugar Land, Sugar Land, TX 77478, USA
| | - Molly K Tate
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center West Houston, Houston, TX 77079, USA
| | - Gregory M Chronowski
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center West Houston, Houston, TX 77079, USA
| | - Jay P Reddy
- Department of Radiation Oncology, The University of Texas, MD Anderson Cancer Center The Woodlands, Conroe, TX 77384, USA
| | - Megan Mezera
- Department of Radiation Oncology, MD Anderson Cancer Center at Cooper, Camden, NJ 08103, USA
| | - Justin M Mann
- Department of Radiation Oncology, MD Anderson Cancer Center at Cooper, Camden, NJ 08103, USA
| | - Mark Augspurger
- Department of Radiation Oncology, Baptist MD Anderson Cancer Center, Jacksonville, FL 32207, USA
| | - Adegbenga O Otun
- Department of Head and Neck Surgery, Division of Surgery, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA
| | - Mark S Chambers
- Department of Head and Neck Surgery, Division of Surgery, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA
| | - Eugene J Koay
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA.
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Wang X, Alqahtani KA, Van den Bogaert T, Shujaat S, Jacobs R, Shaheen E. Convolutional neural network for automated tooth segmentation on intraoral scans. BMC Oral Health 2024; 24:804. [PMID: 39014389 PMCID: PMC11250967 DOI: 10.1186/s12903-024-04582-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 07/05/2024] [Indexed: 07/18/2024] Open
Abstract
BACKGROUND Tooth segmentation on intraoral scanned (IOS) data is a prerequisite for clinical applications in digital workflows. Current state-of-the-art methods lack the robustness to handle variability in dental conditions. This study aims to propose and evaluate the performance of a convolutional neural network (CNN) model for automatic tooth segmentation on IOS images. METHODS A dataset of 761 IOS images (380 upper jaws, 381 lower jaws) was acquired using an intraoral scanner. The inclusion criteria included a full set of permanent teeth, teeth with orthodontic brackets, and partially edentulous dentition. A multi-step 3D U-Net pipeline was designed for automated tooth segmentation on IOS images. The model's performance was assessed in terms of time and accuracy. Additionally, the model was deployed on an online cloud-based platform, where a separate subsample of 18 IOS images was used to test the clinical applicability of the model by comparing three modes of segmentation: automated artificial intelligence-driven (A-AI), refined (R-AI), and semi-automatic (SA) segmentation. RESULTS The average time for automated segmentation was 31.7 ± 8.1 s per jaw. The CNN model achieved an Intersection over Union (IoU) score of 91%, with the full set of teeth achieving the highest performance and the partially edentulous group scoring the lowest. In terms of clinical applicability, SA took an average of 860.4 s per case, whereas R-AI showed a 2.6-fold decrease in time (328.5 s). Furthermore, R-AI offered higher performance and reliability compared to SA, regardless of the dentition group. CONCLUSIONS The 3D U-Net pipeline was accurate, efficient, and consistent for automatic tooth segmentation on IOS images. The online cloud-based platform could serve as a viable alternative for IOS segmentation.
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Affiliation(s)
- Xiaotong Wang
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven, Kapucijnenvoer 33, Leuven, 3000, Belgium
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Harbin Medical University, Youzheng Street 23, Nangang, Harbin, 150001, China
| | - Khalid Ayidh Alqahtani
- Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Sattam Bin Abdulaziz University, Al-Kharj, 16278, Saudi Arabia
| | - Tom Van den Bogaert
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven, Kapucijnenvoer 33, Leuven, 3000, Belgium
| | - Sohaib Shujaat
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven, Kapucijnenvoer 33, Leuven, 3000, Belgium
- King Abdullah International Medical Research Center, Department of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh, 14611, Saudi Arabia
| | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven, Kapucijnenvoer 33, Leuven, 3000, Belgium.
- Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Sattam Bin Abdulaziz University, Al-Kharj, 16278, Saudi Arabia.
- Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Kapucijnenvoer 33, Leuven, 3000, Belgium.
| | - Eman Shaheen
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven, Kapucijnenvoer 33, Leuven, 3000, Belgium
- Department of Dental Medicine, Karolinska Institutet, Solnavägen 1, 171 77, stockholm, 3000, Sweden
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Popa AD, Vlăduțu DE, Turcu AA, Târtea DA, Ionescu M, Păunescu C, Stan RS, Mercuț V. Aspects of Occlusal Recordings Performed with the T-Scan System and with the Medit Intraoral Scanner. Diagnostics (Basel) 2024; 14:1457. [PMID: 39001349 PMCID: PMC11241177 DOI: 10.3390/diagnostics14131457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2024] [Accepted: 07/03/2024] [Indexed: 07/16/2024] Open
Abstract
INTRODUCTION Dental occlusion refers to the static and dynamic relationships that are established between the teeth of the two arches and is an important factor in the homeostasis of the dento-maxillary system. The objective of the present study was to compare two digital occlusal analysis systems: the T-Scan III system and the Medit I600 intraoral scanner. MATERIALS AND METHODS The study was carried out on 20 students from the Faculty of Dental Medicine Craiova, whose dental occlusion was assessed with the T-Scan III system and with the Medit I600 intraoral scanner. Dental occlusion was assessed in the maximum intercuspation position, the edge-to-edge protrusion position, and the edge-to-edge position in right and left laterotrusion. The images of the 2D occlusal contact areas obtained by both methods were converted to .jpeg format and then transferred to Adobe Photoshop CS6 2021 (Adobe Systems, San Jose, CA, USA) for comparison. The recorded data were statistically processed. RESULTS Analyzing the data provided by the two digital occlusal analysis systems, it was found that the T-Scan III system provided data related to the amplitude of the occlusal forces, the surface on which they were distributed (the contact surface), the dynamics of the occlusal contacts, and the proportion in which they were distributed at the level of the two hemiarches, and the Medit I600 intraoral scanner performed an evaluation of the occlusal interface of the two arches, highlighting the extent of the contact areas with the degree of overlapping of the occlusal components. Although both methods of occlusal analysis recorded the highest values for the maximum intercuspation position, the results could not be compared. CONCLUSIONS The two digital systems provide different data in occlusal analysis. As the T-Scan III system is considered the gold standard for occlusal analysis, more studies are needed to understand the data provided by the Medit I600 intraoral scanner and their significance.
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Affiliation(s)
- Angelica Diana Popa
- Department of Prosthetic Dentistry, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Diana Elena Vlăduțu
- Department of Prosthetic Dentistry, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Adina Andreea Turcu
- Department of Oro-Dental Prevention, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Daniel Adrian Târtea
- Department of Oral Rehabilitation, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Mihaela Ionescu
- Department of Medical Informatics and Biostatistics, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Cătălin Păunescu
- Department of IT, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Răzvan Sabin Stan
- Department of IT, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - Veronica Mercuț
- Department of Prosthetic Dentistry, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
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Tsolakis IA, Lyros I, Christopoulou I, Tsolakis AI, Papadopoulos MA. Comparing the accuracy of 3 different liquid crystal display printers for dental model printing. Am J Orthod Dentofacial Orthop 2024; 166:7-14. [PMID: 38647515 DOI: 10.1016/j.ajodo.2024.01.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 01/01/2024] [Accepted: 01/01/2024] [Indexed: 04/25/2024]
Abstract
INTRODUCTION This study aimed to evaluate the accuracy in terms of trueness and precision of 3 different liquid crystal display (LCD) printers with different cost levels. METHODS Three LCD 3-dimensional (3D) printers were categorized into tiers 1-3 on the basis of cost level. The printers' accuracies were assessed in terms of trueness and precision. For this research, 10 standard tessellation language (STL) reference files were used. For trueness, each STL file was printed once with each 3D printer. For precision, 1 randomly chosen STL file was printed 10 times with each 3D printer. After that, a model scanner was used to scan the models, and STL comparisons were performed using reverse engineering software. For the measurements regarding trueness and precision, the Friedman test was used. RESULTS There were significant differences among the 3 printers (P <0.05). The trueness and precision error were lower in models printed with a tier-1 printer than in the remaining 3D printers (P <0.05). The tier-2 and -3 printers presented very similar performance. CONCLUSIONS LCD 3D printers can be accurately used in orthodontics for model printing depending on the specific orthodontic use. The cost of a printer is relevant to the results only for the higher expense of the 3D printer in this study.
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Affiliation(s)
- Ioannis A Tsolakis
- Department of Orthodontics, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece; Department of Orthodontics, School of Dental Medicine, Case Western Reserve University, Cleveland, OH.
| | - Ioannis Lyros
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Isidora Christopoulou
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Apostolos I Tsolakis
- Department of Orthodontics, School of Dental Medicine, Case Western Reserve University, Cleveland, OH; Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece
| | - Moschos A Papadopoulos
- Department of Orthodontics, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Azevedo L, Marques T, Karasan D, Fehmer V, Sailer I, Correia A, Gómez-Polo M. Effect of splinting scan bodies on the trueness of complete arch digital implant scans with 5 different intraoral scanners. J Prosthet Dent 2024; 132:204-210. [PMID: 37537105 DOI: 10.1016/j.prosdent.2023.06.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 06/13/2023] [Accepted: 06/14/2023] [Indexed: 08/05/2023]
Abstract
STATEMENT OF PROBLEM The absence of fixed reference points can affect the trueness of complete arch intraoral digital implant scans. The effect of splinting intraoral scan bodies (ISBs) or the inclusion of artificial landmarks (AL) on the trueness of complete arch digital implant scans is still unclear. PURPOSE The purpose of this study was to analyze the effect of splinting ISBs or the inclusion of AL on the trueness of complete arch digital implant scans with 5 intraoral scanners (IOSs). MATERIAL AND METHODS Six tissue-level dental implants (Straumann Tissue Level) were placed in an edentulous patient, and the correspondent definitive cast was digitized with a desktop scanner (IScan4D LS3i) to obtain the reference digital cast. Digital scans (n=10) were performed with 5 IOSs: TRIOS 4, Virtuo Vivo, Medit i700, iTero Element 5D, and Cerec Primescan. Three different scanning techniques were evaluated: conventional (cIOSs), splinted (sIOSs), and AL (AL-IOSs). The scan data obtained were imported into a metrology software program and superimposed to the reference digital cast by using a best-fit algorithm. The overall deviations of the positions of the ISBs were evaluated by using the root-mean-square (RMS) error (α=.05). RESULTS The mean ±standard deviation trueness values for the cIOSs, sIOSs, and AL-IOSs groups were 48 ±8 µm, 53 ±7 µm, and 49 ±11 µm, respectively, with no statistically significant differences (P=.06). Significant differences were found for the IOSs used with each technique (P<.001). Primescan (27 ±4 µm cIOSs; 28 ±3 µm sIOSs; 31 ±3 µm AL-IOSs) showed significantly higher trueness than iTero 5D (47 ±5 µm cIOSs; 47 ±4 µm sIOSs; 50 ±6 µm AL-IOSs) (P=.002) and TRIOS 4 (93 ±18 µm cIOSs; 76 ±18 µm sIOSs; 107 ±13 µm AL-IOSs) (P=.001) for all techniques. In addition, no significant differences were found between the techniques by using iTero 5D or Primescan (P=.348 and P=.059, respectively). CONCLUSIONS The cIOSs, sIOSs, and AL-IOSs techniques showed similar trueness. The IOS used influenced the trueness of complete arch digital implant scans.
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Affiliation(s)
- Luís Azevedo
- PhD candidate, Department of Conservative Dentistry and Orofacial Prostheses, Faculty of Dentistry, Complutense University of Madrid, Madrid, Spain; Researcher, Center for Interdisciplinary Research in Health, Universidade Católica Portuguesa (UCP), Viseu, Portugal; and Research Assistant, Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland.
| | - Tiago Marques
- Lecturer, Faculty of Dental Medicine, Universidade Católica Portuguesa (UCP), Viseu, Portugal; and Researcher, Center for Interdisciplinary Research in Health, The Catholic University of Portugal (UCP), Viseu, Portugal
| | - Duygu Karasan
- Assistant, Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Vincent Fehmer
- Master Dental Technician, Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Irena Sailer
- Head, Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - André Correia
- Assistant Professor, Faculty of Dental Medicine, Universidade Católica Portuguesa (UCP), Viseu, Portugal; and Researcher, Center for Interdisciplinary Research in Health, The Catholic University of Portugal (UCP), Viseu, Portugal
| | - Miguel Gómez-Polo
- Associate Professor, Faculty of Dentistry, Department of Conservative Dentistry and Orofacial Prostheses, Complutense University of Madrid, Madrid, Spain
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Rutkūnas V, Auškalnis L, Pletkus J. Intraoral scanners in implant prosthodontics. A narrative review. J Dent 2024; 148:105152. [PMID: 38909643 DOI: 10.1016/j.jdent.2024.105152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 05/15/2024] [Accepted: 06/21/2024] [Indexed: 06/25/2024] Open
Abstract
OBJECTIVES To review the developments in intraoral scanner (IOS) technologies applied in implant prosthodontics, emphasizing their influence on the accuracy of digital impressions, occlusal registrations, and the fit of implant-supported restorations. DATA A collection of published articles related to implant prosthodontics, the accuracy of digital impressions, occlusal registration, and the fit of implant-supported fixed restorations. SOURCES Three search engines were selected: Medline/PubMed, EBSCO, and Cochrane. A manual search was also conducted. STUDY SELECTION A literature search screened relevant databases and journals for studies on IOS applications in digital implant prosthodontic workflows from Dec 2018 to Dec 2023. Inclusion criteria encompassed randomized control trials, clinical trials, case series, and in vitro research focused on the use of IOS in digital implant prosthodontics. CONCLUSIONS The increased utilization of digital dental technologies has led to significant integration of digital implant prosthodontic workflows into clinicians' clinical practice. Several variables affect the accuracy of digital impressions generated by IOS. Generally, the prevailing opinion in academic papers is that digital workflows are suitable for addressing short-span implant-supported restorations. However, when it comes to long-span defects, the accuracy of digital workflows is still a matter of debate. Digital bite registration is an integral part of the workflow. It depends mainly on the defect size and location, scan strategy, anatomical tooth variations, overbite and other factors. The overall fit of digitally prefabricated implant restorations comprises of proximal, occlusal contacts and how accurately the restoration connects with implants. Research methodologies need standardization for further validation. CLINICAL SIGNIFICANCE In clinical practice, it is essential to have a thorough and up-to-date comprehension of various factors that can affect the accuracy of digital impressions and the fit of the final prosthesis in implant prosthodontics.
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Affiliation(s)
- Vygandas Rutkūnas
- Professor, PhD, Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | - Liudas Auškalnis
- Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | - Justinas Pletkus
- Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius University, Vilnius, Lithuania.
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Guo J, Lu Y, Li R, Zhou K, Ge R, Zhao D, Xia S, Wang Y. Influence of Repeated Cut-off and Rescanning on the Trueness of the Intraoral Digital Scans. J Dent 2024:105153. [PMID: 38914183 DOI: 10.1016/j.jdent.2024.105153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 05/02/2024] [Accepted: 06/21/2024] [Indexed: 06/26/2024] Open
Abstract
OBJECTIVES To evaluate the effects of repeated cut-off and rescan procedures on the trueness of three intraoral scanners (IOS). METHODS A tooth model (#16) with a standard class II cavity was prepared, and the complete-arch was scanned using a laboratory scanner (D2000, 3Shape A/S) to obtain a reference scan. Then the typodont was scanned with three IOSs (3Shape TRIOS 3, CEREC Omnicam, and Medit i500) under two rescanning strategies (full-cut and partial-cut), with varying numbers of repeated cut-off and rescanning procedures (0, 1, 3, 5, 7, or 10). The trueness discrepancy between the reference and experimental digital scan was estimated using root mean square (RMS) calculations. Three regions of interest were selected to represent the rescanning, identification, and non-rescan area. And the discrepancies were analyzed using a linear mixed model (α=.05). RESULTS Cut-off and rescanning procedures significantly decreased the trueness of digital scans in all test conditions compared to the reference. However, no progressive increase in discrepancy was observed under any rescan conditions. Significant influences on trueness were found based on the IOS used, with the 3Shape system exhibiting lower RMS values. The partial-cut strategy showed lower RMS values compared to the full-cut strategy, albeit without statistical significance. CONCLUSIONS While repeated cut-off and rescanning procedures led to a decline in the quality of digital impressions, they did not result in discrepancy accumulation with repeated rescanning. CLINICAL SIGNIFICANCE To ensure high scanning accuracy in dental practice, it is advisable to minimize the rescanning area when correcting imperfections in digital scans. Additionally, selecting an appropriate scanner can help mitigate the negative effects of the rescanning technique.
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Affiliation(s)
- Jiawen Guo
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Yu Lu
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Runli Li
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Kai Zhou
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Ruihan Ge
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China
| | - Diancai Zhao
- The Second People's Hospital of Nanhai District, Guangdong Provincial People's Hospital's Nanhai Hospital, Foshan, China
| | - Shasha Xia
- The Second People's Hospital of Nanhai District, Guangdong Provincial People's Hospital's Nanhai Hospital, Foshan, China
| | - Yan Wang
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, China.
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Rutkūnas V, Jegelevičius D, Gedrimienė A, Revilla-León M, Pletkus J, Akulauskas M, Eyüboğlu TF, Özcan M, Auškalnis L. Effect of 3D printer, implant analog system, and implant angulation on the accuracy of analog position in implant casts. J Dent 2024:105135. [PMID: 38885735 DOI: 10.1016/j.jdent.2024.105135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 06/04/2024] [Accepted: 06/14/2024] [Indexed: 06/20/2024] Open
Abstract
OBJECTIVES To evaluate the accumulative effect of 3D printer, implant analog systems, and implant angulation on the accuracy of analog position in implant casts. METHODS A reference cast, presenting a case of a three-unit implant-supported prosthesis, was scanned with a coordinate measurement machine, producing the first reference data set (CMM, n = 1). The second reference data set (n = 10) was prepared using an intraoral scanner (IOS) (Trios4). Test quadrant casts were produced using three DLP type 3D printers, Max (MAX UV385), Pro (PRO 4K65 UV), and Nex (NextDent 5100), and three implant analog systems, El (Elos), Nt (Nt-trading), and St (Straumann) (n = 90). Stone casts were also produced via analog impressions (Stone, n = 10). After digitization, the accuracy of 3D distance, local angulation (angle between implants) and global angulation (angle between the implant center axis and an axis perpendicular to the global plane) was evaluated by comparing the reference (CMM, IOS), test (3D print), and control (Stone) groups using metrology software. Data were statistically analyzed using three-way ANOVA and Tukey`s tests (α=0.05). RESULTS IOS was truer in 3D implant distance and more precise in capturing local angulation than Stone (p ≤ 0.05). Other measurements were similar between both groups (p > 0.05). The amount of error introduced in the workflow by IOS and 3D printing was mostly similar (p > 0.05). 3D printed casts had similar or even higher accuracy than Stone group (p > 0.05). In most cases, higher trueness was achieved when using PRO 4K65 UV 3D printer and Elos implant analog system (p ≤ 0.05). CONCLUSION 3D printer, implant analog system, and implant angulation have a significant effect on the accuracy of analog position in implant casts. Limited-span implant-supported cases could be reproduced digitally with similar accuracy as conventional methods. CLINICAL SIGNIFICANCE A fully digital workflow with a carefully selected 3D printer and implant analog system can increase the accuracy of digitally produced implant casts with comparable accuracy to conventional workflow.
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Affiliation(s)
- Vygandas Rutkūnas
- Professor, DDS, PhD, Vilnius University, Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius, Lithuania.
| | - Darius Jegelevičius
- Associate Professor, Kaunas University of Technology, Biomedical Engineering Institute, Department of Electronics Engineering, Kaunas, Lithuania
| | - Agnė Gedrimienė
- Assistant Professor, DDS, PhD, Vilnius University, Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius, Lithuania
| | - Marta Revilla-León
- Affiliate Assistant Professor, DDS, MSD, PhD, Graduate Prosthodontics, University of Washington, Department of Restorative Dentistry, School of Dental Medicine, Seattle, WA, USA; Kois Center, Seattle, WA, USA; Tufts University, Department of Prosthodontics, Boston, MA, USA
| | - Justinas Pletkus
- Assistant Professor, DDS, Vilnius University, Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius, Lithuania
| | - Mykolas Akulauskas
- PhD student, Kaunas University of Technology, Biomedical Engineering Institute, Lithuania
| | - Tan Fırat Eyüboğlu
- Associate Professor, Dr. Dr., DDS, PhD, JSD, Department of Endodontics, Faculty of Dentistry, Istanbul Medipol University, Istanbul, Türkiye
| | - Mutlu Özcan
- Professor, Dr. Dr. med.dent., Ph.D, University of Zurich, Clinic of Masticatory Disorders and Dental Biomaterials, Center for Dental Medicine, Zurich, Switzerland
| | - Liudas Auškalnis
- Assistant Professor, DDS, Vilnius University, Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius, Lithuania
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Corte-Real A, Ribeiro R, Machado R, Silva AM, Nunes T. Digital intraoral and radiologic records in forensic identification: Match with disruptive technology. Forensic Sci Int 2024; 361:112104. [PMID: 38936201 DOI: 10.1016/j.forsciint.2024.112104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 06/07/2024] [Accepted: 06/11/2024] [Indexed: 06/29/2024]
Abstract
While clinical dentistry has seamlessly integrated the digital revolution, there is a gap in the technological capabilities of forensic dentistry.The study aimed to compare the superimposition accuracy of two different three-dimensional record formats, namely the intraoral scanner and cone beam computer tomography, in the context of forensic identification.The sample consisted of randomly selected adults (n=10) of both sexes aged between 20 and 50 years. Following the acquisition of data using the Medit i700 wireless scanner and the iCAT Tomograph with InVivo software, the records were analysed and compared through superimposition using Medit Scan Clinic software to assess the technical precision of anatomical identification details.The results obtained through the superimposition of dental and bone records following intra- and inter-observer analysis enabled an accurate comparison and identification of an individual. This method can differentiate between positive and negative matches, achieving exclusion results and offering a potential solution to overcoming the absence of a standardisation procedure in human identification.
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Affiliation(s)
- Ana Corte-Real
- University of Coimbra, Forensic Dentistry Laboratory, Faculty of Medicine, Coimbra, Portugal.
| | - Rita Ribeiro
- University of Coimbra, Forensic Dentistry Laboratory, Faculty of Medicine, Coimbra, Portugal.
| | - Ricardo Machado
- University of Coimbra, Forensic Dentistry Laboratory, Faculty of Medicine, Coimbra, Portugal.
| | - Ana Mafalda Silva
- University of Coimbra, Forensic Dentistry Laboratory, Faculty of Medicine, Coimbra, Portugal.
| | - Tiago Nunes
- University of Coimbra, Forensic Dentistry Laboratory, Faculty of Medicine, Coimbra, Portugal.
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11
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Strasding M, Marchand L, Merino E, Zarauz C, Pitta J. Material and abutment selection for CAD/CAM implant-supported fixed dental prostheses in partially edentulous patients - A narrative review. Clin Oral Implants Res 2024. [PMID: 38864592 DOI: 10.1111/clr.14315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 05/15/2024] [Accepted: 05/27/2024] [Indexed: 06/13/2024]
Abstract
Restorative material selection has become increasingly challenging due to the speed of new developments in the field of dental material science. The present narrative review gives an overview of the current indications for implant abutments and restoration materials for provisional and definitive implant-supported fixed dental prostheses in partially edentulous patients. For single implant restorations, titanium base abutments for crowns are suggested as an alternative to the conventional stock- and customized abutments made out of metal or zirconia. They combine the mechanical stability of a metallic connection with the esthetic potential of ceramics. For multiple-unit restorations, conical titanium bases especially designed for bridges are recommended, to compensate for deviating implant insertion axes and angulations. Even though titanium base abutments with different geometries and heights are available, certain clinical scenarios still benefit from customized titanium abutments. Indications for the definitive material in fixed implant restorations depend on the region of tooth replacement. In the posterior (not esthetically critical) zone, ceramics such as zirconia (3-5-Ymol%) and lithium-disilicate are recommended to be used in a monolithic fashion. In the anterior sector, ceramic restorations may be buccally micro-veneered for an optimal esthetic appearance. Lithium-disilicate is only recommended for single-crowns, while zirconia (3-5-Ymol%) is also recommended for multiple-unit and cantilever restorations. Attention must be given to the specific mechanical properties of different types of zirconia, as some feature reduced mechanical strengths and are therefore not indicated for all regions and restoration span lengths. Metal-ceramics remain an option, especially for cantilever restorations.
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Affiliation(s)
- Malin Strasding
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Laurent Marchand
- Department of Prosthodontics, School of Dental Medicine, Tufts University, Boston, Massachusetts, USA
| | - Elizabeth Merino
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Cristina Zarauz
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - João Pitta
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
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12
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Schmalzl J, Keskeny GÁ, Hermann P, Pál A, Géczi Z, Borbély J, Róth I. Evaluating the influence of palate scanning on the accuracy of complete-arch digital impressions-An in vitro study. J Dent 2024; 145:105014. [PMID: 38648874 DOI: 10.1016/j.jdent.2024.105014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 04/12/2024] [Accepted: 04/19/2024] [Indexed: 04/25/2024] Open
Abstract
OBJECTIVES To assess the impact of including the palate and the number of images recorded during intraoral digital scanning procedure on the accuracy of complete arch scans. METHODS An experienced operator conducted 40 digital scans of a 3D printed maxillary model and divided them into two groups: 20 with inclusion of the palate (PAL) and 20 without (NPAL). Each set of scans was performed using an intraoral scanner (IOS) (Trios 5; 3Shape A/S; Copenhagen, Denmark). The resulting STL files were imported into the Geomagic Control X software (3D Systems, Rock Hill, SC, USA) for accuracy comparison. A reference STL file was created using a 3Shape E3 laboratory scanner (3Shape Scanlt Dental 2.2.1.0; Copenhagen, Denmark). The number of images captured was recorded during the scanning procedure. RESULTS In the case of the right side no statistically significant difference in trueness was detected (84 µm ± 45.6 for PAL and 80.4 ± 40.4 µm for NPAL). In the case of the left side no significant difference in trueness was observed (215.1 ± 70.2 µm for PAL and 233.9 ± 70.7 µm for NPAL). In the case of the arch distortion a statistically significant difference in trueness was seen between the two types of scans (135.3 ± 71.9 µm for PAL and 380.4 ± 255.1 µm for NPAL). The average number of images was 831.25, and 593.8 for PAL and NPAL, respectively. CONCLUSIONS Scanning of the palatal area can significantly improve the accuracy of dental scans in cases of complete arches. In terms of the number of images, based on the current results, obvious conclusions could not be drawn, and further investigation is required. CLINICAL SIGNIFICANCE Scanning the palate may be beneficial for improving the accuracy of intraoral scans in dentate patients. Consequently, this should be linked to an appropriate scanning strategy that predicts palatal scanning.
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Affiliation(s)
- Judit Schmalzl
- Department of Prosthodontics, Semmelweis University, Szentkirályi street 47, Budapest 1088, Hungary; Semmelweis University's School of Ph.D. Studies, Üllői u. 26, Budapest 1085, Hungary.
| | - György Árpád Keskeny
- Semmelweis University's School of Ph.D. Studies, Üllői u. 26, Budapest 1085, Hungary
| | - Péter Hermann
- Department of Prosthodontics, Semmelweis University, Szentkirályi street 47, Budapest 1088, Hungary
| | - Adrienn Pál
- Department of Prosthodontics, Semmelweis University, Szentkirályi street 47, Budapest 1088, Hungary; Semmelweis University's School of Ph.D. Studies, Üllői u. 26, Budapest 1085, Hungary
| | - Zoltán Géczi
- Department of Prosthodontics, Semmelweis University, Szentkirályi street 47, Budapest 1088, Hungary
| | - Judit Borbély
- Department of Prosthodontics, Semmelweis University, Szentkirályi street 47, Budapest 1088, Hungary
| | - Ivett Róth
- Department of Prosthodontics, Semmelweis University, Szentkirályi street 47, Budapest 1088, Hungary
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Thekiya TSA, Walia T, Shetty RM, Berdouses ED, Hashim R, Al Jaghsi A. Variation of OXIS contact areas in primary molars among 3-6-year-old children with intraoral digital scanning. Eur Arch Paediatr Dent 2024; 25:433-441. [PMID: 38698225 DOI: 10.1007/s40368-024-00902-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Accepted: 04/04/2024] [Indexed: 05/05/2024]
Abstract
PURPOSE To determine the variation of OXIS contact areas in primary molars using digital impressions generated from an intraoral scanner (IOS). METHODS A cross-sectional study was carried out on 214 caries-free posterior quadrants of 80 children (38 males and 42 females) aged 3-6 years. Calibration of taking digital impressions with the IOS procedure was performed initially through scanning of ten quadrants of children to provide a learning environment to the examiner. The digital impressions were then exported, and the type of interproximal contact areas present between the distal surface of the primary first molar and the mesial surface of the primary second molar were identified according to the OXIS classification. The prevalence of the types of OXIS contact areas was expressed in the form of numbers and percentages. The chi-square test was applied to investigate the variability among the arches and to understand the association of OXIS contact areas across age, gender, and arches. RESULTS The most common contact area type observed was I-type (59.8%), followed by S-type (15.4%), X-type (12.6%), and O-type (12.2%). The I-type contact area was most frequently seen in both males (51.6%) and females (65.5%), while the S-type contact area in males (14.7%) and X-type contact area in females (8.4% each) were the least frequent with no statistical significance between genders (p > 0.05). All three age groups studied showed the highest prevalence of the I-type contact area, which increased with an increase in age (p < 0.05). The inter-arch comparison showed a significant result in terms of the X-type contact area on the right side, and O-type, X-type, and I-type contact areas on the left side, while no statistical difference was seen in the intra-arch comparison for all contact types. CONCLUSION I-type contact areas were the most prevalent across the arches, age groups and genders.
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Affiliation(s)
- T S A Thekiya
- Pediatric Dentistry, College of Dentistry, Ajman University, Ajman, United Arab Emirates
| | - T Walia
- Department of Clinical Sciences, College of Dentistry, Ajman University, Ajman, United Arab Emirates.
| | - R M Shetty
- Department of Clinical Sciences, College of Dentistry, Ajman University, Ajman, United Arab Emirates
- Department of Pediatric and Preventive Dentistry, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Higher Education and Research (Declared As Deemed-to-Be University), Wardha, Maharashtra, India
| | - E D Berdouses
- Department of Clinical Sciences, Dentistry, Ajman University, Ajman, United Arab Emirates
| | - R Hashim
- Department of Basic Medical and Dental Sciences, Center of Medical and Bio-Allied Health Sciences Research, Ajman University, Ajman, United Arab Emirates
| | - A Al Jaghsi
- Clinical Sciences Department, College of Dentistry, Center of Medical and Bio-Allied Health Sciences Research, Ajman University, Ajman, United Arab Emirates
- Department of Prosthodontics, Gerodontology and Dental Materials, Greifswald University Medicine, Greifswald, Germany
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14
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Bronkhorst H, Kalaykova S, Huysmans MC, Loomans B, Pereira-Cenci T. Tooth wear and bruxism: A scoping review. J Dent 2024; 145:104983. [PMID: 38574847 DOI: 10.1016/j.jdent.2024.104983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 03/27/2024] [Accepted: 03/29/2024] [Indexed: 04/06/2024] Open
Abstract
OBJECTIVE This study presents a scoping review to determine the association between tooth wear and bruxism. DATA A protocol was developed a priori (Open Science Framework (DOI 10.17605/OSF.IO/CS7JX)). Established scoping review methods were used for screening, data extraction, and synthesis. Risk of bias was assessed using JBI tools. Direct associations between tooth wear and bruxism were assessed. SOURCES Embase, SCOPUS, Web of Science, Cochrane, and PubMed were searched. STUDY SELECTION Any clinical study containing tooth wear and bruxism assessment done on humans in any language was included. Animal, in-vitro studies and case reports were excluded. CONCLUSIONS Thirty publications reporting on the association between tooth wear and bruxism were included. The majority of publications were cross-sectional studies (90%) while only three were longitudinal (10%). Eleven papers assessed definitive bruxism for analysis (instrumental tools), one paper assessed probable bruxism (clinical inspection with self-report) and eighteen assessed possible bruxism (self-report). Of the eleven papers assessing definitive bruxism, eight also reported outcomes of non-instrumental tools. Tooth wear was mostly scored using indexes. Most studies reported no or weak associations between tooth wear and bruxism, except for the studies done on cervical tooth wear. When bruxism assessment was done through self-report, more often an association was found. Studies using multivariate analyses did not find an association between tooth wear and bruxism, except the cervical wear studies. Evidence shows inconclusive results as to whether bruxism and tooth wear are related or not. Therefore, well-designed longitudinal trials are needed to address this gap in the literature. CLINICAL SIGNIFICANCE Based on the evidence, dental clinicians should not infer bruxism activity solely on the presence of tooth wear.
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Affiliation(s)
- Hilde Bronkhorst
- Department of Dentistry, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands.
| | - Stanimira Kalaykova
- Department of Dentistry, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands
| | - Marie-Charlotte Huysmans
- Department of Dentistry, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands
| | - Bas Loomans
- Department of Dentistry, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands
| | - Tatiana Pereira-Cenci
- Department of Dentistry, Radboud University Medical Center, Philips van Leydenlaan 25, 6525 EX Nijmegen, The Netherlands
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15
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Lawand G, Ismail Y, Revilla-León M, Tohme H. Effect of implant scan body geometric modifications on the trueness and scanning time of complete arch intraoral implant digital scans: An in vitro study. J Prosthet Dent 2024; 131:1189-1197. [PMID: 35864021 DOI: 10.1016/j.prosdent.2022.06.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 06/07/2022] [Accepted: 06/08/2022] [Indexed: 11/22/2022]
Abstract
STATEMENT OF PROBLEM The effect of the surface geometry of implant scan bodies (ISBs) on the accuracy and scanning time of complete arch implant digital scans remains uncertain. PURPOSE The purpose of this in vitro study was to evaluate whether geometric modifications on implant scan bodies (nonmodified, subtractively modified, and additively modified ISBs) affect the trueness and scanning time of complete arch intraoral implant digital scans. MATERIAL AND METHODS A completely edentulous maxillary cast with 2 anterior parallel and two 17-degree posteriorly tilted implant abutment analogs was prepared. A digitized reference was created from this cast with polyetheretherketone (PEEK) (CARES Mono Scanbody for screw-retained abutment) ISBs by using a desktop scanner (E3). Three different groups were created: nonmodified (NM group), subtractively modified (SM group), and additively modified (AM group). For the NM group, no modifications were made to the ISBs. For the SM group, 4 round-shaped grooves were created on the buccal, lingual, mesial, and distal sides. For the AM group, PEEK beads were printed and cemented on the same areas of the ISB of the SM group. Fifteen consecutive scans were captured with an intraoral scanner (TRIOS 3) for each group, and the scanning time was recorded. By using a metrology software program, scans of each group were superimposed on the reference file to determine the 3D surface, linear, and angular position discrepancies of each ISB. Repeated-measures analyses of variance followed by univariate analysis and Bonferroni multiple comparison tests were performed to analyze the data (α=.05). To compare the mean time among groups, 1-way analysis of variance was performed followed by the Tukey post hoc tests. RESULTS Significant 3D surface, linear, and angular position discrepancies were found when measuring trueness among the NM, SM, and AM groups (P<.001). Discrepancies in 3D surface deviation were highest for the AM group (0.266 ±0.030 mm), and the lowest mean angular deviation values were for the SM group (0.993 ±0.062 degrees). However, the mean scanning time was not significantly different among the groups tested (P=.237). CONCLUSIONS For complete arch intraoral implant digital scans, subtractive modifications on ISBs enhanced scanning trueness, while additive modifications on ISBs decreased scanning trueness. However, implant scan body geometric modifications did not affect scanning time.
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Affiliation(s)
- Ghida Lawand
- Resident, Department of Prosthodontics and Esthetic Dentistry, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon.
| | - Yara Ismail
- Resident, Department of Prosthodontics and Esthetic Dentistry, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon
| | - Marta Revilla-León
- Affiliate Assistant Professor, Graduate Prosthodontics, Department of Restorative Dentistry, School of Dentistry, University of Washington, Seattle, Wash; Director of Research and Digital Dentistry, Kois Center, Seattle, Wash; Adjunct Professor, Department of Prosthodontics, Tufts University, Boston, Mass
| | - Hani Tohme
- Founder and Head of Digital Dentistry Unit, Postgraduate Program Director, Department of Removable Prosthodontics, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon
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Alsulaimani L, Qali M. Relationship Between Cone-Beam CT Evaluation and Clinical Evaluation Before and After Orthodontic Treatment and the Rate of Gingival Recession: A Systematic Review. Cureus 2024; 16:e62536. [PMID: 39022498 PMCID: PMC11254124 DOI: 10.7759/cureus.62536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/17/2024] [Indexed: 07/20/2024] Open
Abstract
A systematic review was conducted to investigate the correlation between gingival recession and orthodontic treatment analysis using cone-beam CT (CBCT) dental images to provide an accurate overview of the factors that can influence gingival recession. The literature was searched across several databases (PubMed, Scopus, Web of Science, etc.) for studies using CBCT dental images. Four full-text articles describe how CBCT is used to evaluate gingival recession during orthodontic treatment. The Risk-of-Bias VISualization tool was used to assess the risk of bias. In dentistry, CBCTs are used for various imaging modalities. An accurate assessment of gingival recession was made using CBCT. There were only 35 (22.5%) cases of retraction of the gingival margin after orthodontic treatment. In most studies, various types of malocclusions were treated successfully with fixed orthodontic treatment without gingival recession. Among the studies, 50% had a low risk of bias in all four areas, while one study (25%) had an unclear risk of bias. Only one study (25%) had a high risk of bias. CBCT systems have been extensively studied to show their wide application potential in preventing gingival recession. CBCT systems should be further investigated to address limitations associated with methodology and application. Dental applications of CBCT can be enriched by overcoming these challenges.
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Affiliation(s)
- Lujain Alsulaimani
- Department of General Dentistry, Al Baha Specialized Dental Hospital, Ministry of Health, Al Bahah, SAU
| | - Mohammad Qali
- Department of Surgical Sciences, College of Dentistry, Health Sciences Center, Kuwait University, Kuwait, KWT
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17
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Khoshkhahesh M, Enteghad S, Aghasadeghi K, Farzin M, Taghva M, Mosadad SA. Evaluation of the effect of different core substrates on the accuracy of intraoral scanners. Clin Exp Dent Res 2024; 10:e899. [PMID: 38752461 PMCID: PMC11097246 DOI: 10.1002/cre2.899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 03/27/2024] [Accepted: 04/28/2024] [Indexed: 05/19/2024] Open
Abstract
BACKGROUND The aim of this study was to determine if different types of core substrates have any effect on the trueness and precision of digital intraoral impressions. MATERIAL AND METHODS A customized typodont with four similar cores of natural dentine, composite, metal (Ni-Cr), and zirconia in the position of premolars was fabricated. The study model was scanned five times with two types of intraoral scanners (Carestream 3600 and 3Shape Trios 3), and a reference standard scan was obtained using a laboratory scanner (3shape D1000). A metrology software (Geomagic X) was used to align the data of experimental scans and the reference scan to determine deviation values (trueness). Precision values were calculated with random superimposition in each intraoral scanner group. The Kruskal-Wallis test was used to compare differences between different substrates, and the Mann-Whitney test was used to compare the average values between the two scanners. RESULTS Trios 3 was found to be significantly truer and more precise than Carestream 3600 (p value = .005, <0.001). There were no significant differences in the trueness of different substrates when they were scanned by Trios 3, while different materials showed significantly different trueness values in the Carestream 3600 group (p value = .003). Dentin showed the best trueness, and zirconia performed worse than other substrates. Regarding the precision of the scanners, neither of the scanners was affected by the type of scanning substrate. CONCLUSION For Carestream 3600, substrate type did impact the trueness of intraoral scans, with dentin and zirconia showing the highest and lowest accuracy, respectively, while Trios 3 was similarly accurate across all substrates. Trios 3 had both higher trueness and precision than Carestream 3600.
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Affiliation(s)
- Maryam Khoshkhahesh
- Department of Prosthodontics, School of DentistryShiraz University of Medical SciencesShirazIran
| | - Shabnam Enteghad
- Department of Oral Health Sciences, Faculty of DentistryUniversity of British ColumbiaVancouverBritish ColumbiaCanada
| | - Kiana Aghasadeghi
- Student Research CommitteeIslamic Azad University of ShirazShirazIran
| | - Mitra Farzin
- Department of Prosthodontics, School of DentistryShiraz University of Medical SciencesShirazIran
| | - Masumeh Taghva
- Department of Prosthodontics, School of DentistryShiraz University of Medical SciencesShirazIran
| | - Seyed Ali Mosadad
- Department of Research Analytics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical SciencesSaveetha UniversityChennaiIndia
- Department of Conservative Dentistry and Bucofacial Prostheses, Faculty of OdontologyUniversity Complutense of MadridMadridSpain
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18
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Wang X, Zhang F, Ma D, Ye X, Zheng X, Ren R, Ren N, Bai S. Evaluation of the accuracy of seven intraoral scanners for the full dentate and partially edentulous complete-arch mandibular casts: An in vitro comparison. Heliyon 2024; 10:e31063. [PMID: 38803930 PMCID: PMC11128860 DOI: 10.1016/j.heliyon.2024.e31063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 04/11/2024] [Accepted: 05/09/2024] [Indexed: 05/29/2024] Open
Abstract
Statement of problem Intraoral scanners (IOSs) are widely used in dentistry, providing high accuracy in short-range scanning. Nevertheless, when scanning the full dental arch, it remains a challenge. Furthermore, there is a lack of studies reporting the differences in scan accuracy between dental arches with large-span mucosal areas and fully dentate casts or optimal IOS selection for different dental statuses. Purpose This study aimed to evaluate the accuracy and scanning time of different IOSs for full dentate (FD) and partially edentulous (PE) casts with missing teeth in the #34-#44 range and to determine the IOSs with the optimal clinical adaptability and scanning accuracy for different complete-arch casts. Material and methods Reference scans of two complete-arch (FD and PE) casts were obtained using a laboratory scanner (Ceramill Map 600). Subsequently, the same casts were scanned ten times each by seven IOSs (3Shape Trios 3, CS3600, Planmeca Emerald, iTero Element 5D, Medit i500, BAMBOO B1, and Shining Aoralscan 3), and the scanning time was recorded. The test data were superimposed on the reference scans for the selected areas, and three-dimensional deviations between the reference and test casts (trueness), and between test casts (precision) were determined using reverse engineering software (Geomagic Wrap). The dataset was analyzed using a two-factor analysis of variance with post-hoc Bonferroni tests. Results Two-factor analysis of variance revealed significant differences in accuracy and scanning time for different casts (P < 0.001) and IOSs (P < 0.001). For the FD cast, the i500 (0.35 ± 0.11 mm trueness) and CS3600 (0.23 ± 0.12 mm precision) performed worse than the remaining scanners. For the PE cast, the BAMBOO B1(0.89 ± 0.58 mm trueness; 0.88 ± 0.48 mm precision) performed worse than the remaining scanners. There were no differences in the accuracy of scanning between the Element 5D and Emerald for both cast types. However, the scanning time differed significantly between the different IOSs (P < 0.001). Regardless of the cast type, the fastest and slowest scans were performed by the Trios3 and CS3600 scanners respectively. Conclusions The accuracy and scanning time differed between the different IOSs and types of complete-arch casts.
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Affiliation(s)
- Xin Wang
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Digital Center, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Fang Zhang
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Digital Center, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Dan Ma
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Digital Center, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Xiaolan Ye
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Digital Center, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Xiaojuan Zheng
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Digital Center, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Ruifang Ren
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Digital Center, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Nan Ren
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Digital Center, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Shizhu Bai
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Digital Center, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, China
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Hao J, Kang Y, Wei S, Wang J, Wang H. 3D intraoral scanning techniques support the effects of crown morphology on dental caries. BMC Oral Health 2024; 24:549. [PMID: 38730377 PMCID: PMC11088106 DOI: 10.1186/s12903-024-04292-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 04/24/2024] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND With the development and utilization of three-dimensional (3D) intraoral scanning (IOS) technology, the morphological characteristics of teeth were quantitatively assessed. In this research, we aimed to explore the prevalence of dental caries in relation to each measurable morphological indicator of the tooth body via 3D intraoral scanning techniques. METHODS A hospital-based single-centre study was conducted at our hospital from Dec. 2021 to Apr. 2023. A total of 53 patients were involved in the study, providing complete morphological data for 79 teeth. Each patient completed an oral hygiene routine questionnaire and underwent examination by an experienced dentist to evaluate caries conditions before undergoing 3D intraoral scanning to obtain a digital dental model. Geomagic Studio 2014 was used to extract oral morphological data from the models. The acquired data were entered, cleaned and edited using Excel 2016 and subsequently exported to SPSS version 25.0 for analysis. Chi-square analysis and logistic regression analyses were employed to test the associations. RESULTS Among the participants, 33 (61.1%) were female, with a mean age of 26.52 ± 10.83 years. Significant associations were found between dental caries and the vertical distance between the distal tip and the gum (OR 14.02; 95% CI 1.80-109.07; P = 0.012), the distal lateral horizontal distance of occlusion (OR 0.40; 95% CI 0.18-0.90; P = 0.026), and the mesial horizontal distance of occlusion (OR 2.20; 95% CI 1.12-4.31; P = 0.021). The Hosmer-Lemeshow test indicated a P value of 0.33. CONCLUSIONS The vertical distance between the distal tip and the gum, the distal lateral horizontal distance of the occlusion and the mesial horizontal distance of the occlusion were the influencing factors for dental caries (identified as independent risk factors). We hypothesize that these factors may be associated with the physiological curvature of teeth and the role of chewing grooves in plaque formation over time. However, further studies involving larger population samples and more detailed age stratification are still needed.
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Affiliation(s)
- Jincheng Hao
- Department of Stomatology, Beijing Chao Yang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, PR China
| | - Yuting Kang
- Department of Stomatology, Beijing Chao Yang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, PR China
| | - Siyuan Wei
- Department of Stomatology, Ciqu Community Health Service Center of Tongzhou District, Beijing, China
| | - Jing Wang
- Department of Thoracic Surgery, Beijing Chaoyang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, PR China.
| | - Haiyan Wang
- Department of Stomatology, Beijing Chao Yang Hospital, Capital Medical University, No. 8 Gongtinan Road, Chaoyang District, Beijing, 100020, PR China.
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20
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Auškalnis L, Akulauskas M, Osnes C, Revilla-León M, Kernen-Gintautė A, Rutkūnas V. Trueness of maxillomandibular relationship in 3D-printed and conventional casts. J Dent 2024:105044. [PMID: 38710316 DOI: 10.1016/j.jdent.2024.105044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 04/10/2024] [Accepted: 05/03/2024] [Indexed: 05/08/2024] Open
Abstract
OBJECTIVES To compare the trueness of maxillomandibular relationship between articulated 3D-printed and conventional diagnostic casts in maximum intercuspation (MIP). METHODS Reference casts were articulated in MIP, and scanned using a Coordinate Measurement Machine (CMM, n = 1). Digital scans were made from the reference casts by using an intraoral scanner (IOS, n = 10) (Trios 4; 3Shape A/S). IOS scans were processed to create 3D-printed casts by using MAX UV385 (Asiga) and NextDent 5100 (3DSystems) 3D-printers. The conventional workflow implemented vinylpolysiloxane (VPS) impressions and Type IV stone. Stone and 3D-printed casts were articulated and digitized with a laboratory scanner (E4; 3Shape A/S). The 3D-printed casts were scanned on two occasions: with and without positioning pins. Inter-arch distances and 3D-contact area were measured and compared. Statistical tests used were Shapiro-Wilk, Levene's, Welch's t-test, and 2-way ANOVA (α=0.05). RESULTS IOS group showed similar or better maxillomandibular relationship trueness than stone casts and 3D-printed casts (p < 0.05). 3D-contact area analysis showed similar deviations between 3D-printed and stone casts (p > 0.05). The choice of 3D-printer and presence of positioning pins on the casts significantly influenced maxillomandibular relationship trueness (p < 0.05). CONCLUSIONS Articulated 3D-printed and stone casts exhibited similar maxillomandibular relationship trueness. CLINICAL SIGNIFICANCE Although 3D-printing methods can introduce a considerable amount of deviations, the maxillomandibular relationship trueness of articulated 3D-printed and stone casts in MIP can be considered similar.
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Affiliation(s)
- Liudas Auškalnis
- PhD student, Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius University, Vilnius, Lithuania.
| | - Mykolas Akulauskas
- PhD student, Biomedical Engineering Institute, Kaunas University of Technology, Kaunas, Lithuania
| | - Cecilie Osnes
- Research Assistant, School of Dentistry, University of Leeds, Leeds, UK
| | - Marta Revilla-León
- DDS, MSD, PhD, Affiliate Assistant Professor, Graduate Prosthodontics, Department of Restorative Dentistry, School of Dentistry, University of Washington, Seattle, Wash and Faculty and Director, Research and Digital Dentistry, Kois Center, Seattle, Wash; Adjunct Professor, Department of Prosthodontics, School of Dental Medicine, Tufts University, Boston, Mass, USA
| | - Aistė Kernen-Gintautė
- Dr. med. dent., University Hospital Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Germany
| | - Vygandas Rutkūnas
- Professor, PhD, Department of Prosthodontics, Institute of Odontology, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
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Zhang J, Fan L, Xie C, Li J, Zhang Y, Yu H. A digital workflow for layering composite resin restorations by using 3-dimensionally printed templates to replicate the contralateral tooth accurately and rapidly. J Prosthet Dent 2024; 131:774-780. [PMID: 35513919 DOI: 10.1016/j.prosdent.2022.03.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/02/2022] [Accepted: 03/03/2022] [Indexed: 02/08/2023]
Abstract
This article described a digital workflow for layering composite resin restorations by using a digital software program and 3-dimensionally printed templates. To mimic the appearance of the natural tooth, the computer-aided design was used to copy the shape of the contralateral tooth. Three-dimensionally printed templates to replicate the contralateral tooth accurately and rapidly can help dentists build different layers of dentin and enamel composite resin, achieving layered esthetic outcomes. This workflow provides an efficient and accurate procedure, reduces chairside time, and simplifies the application of the technically sensitive composite resin layering technique.
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Affiliation(s)
- Junjing Zhang
- Graduate student, Department of Dental Technology, West China Hospital of Stomatology, Sichuan University, Chengdu, PR China
| | - Lin Fan
- Graduate student, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, PR China
| | - Chenyang Xie
- Graduate student, Department of Dental Technology, West China Hospital of Stomatology, Sichuan University, Chengdu, PR China
| | - Junying Li
- Research Fellow and Clinical Lecturer, Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Mich
| | - Yuqiang Zhang
- Graduate student, Department of Dental Technology, West China Hospital of Stomatology, Sichuan University, Chengdu, PR China
| | - Haiyang Yu
- Professor, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, PR China.
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Pilecco RO, Machry RV, Baldi A, Tribst JPM, Sarkis-Onofre R, Valandro LF, Kleverlaan CJ, Scotti N, Pereira GKR. Influence of CAD-CAM milling strategies on the outcome of indirect restorations: A scoping review. J Prosthet Dent 2024; 131:811.e1-811.e10. [PMID: 38480018 DOI: 10.1016/j.prosdent.2024.02.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/19/2024] [Accepted: 02/20/2024] [Indexed: 05/13/2024]
Abstract
STATEMENT OF PROBLEM The influence of computer-aided manufacturing (CAM) parameters and settings on the outcomes of milled indirect restorations is poorly understood. PURPOSE The purpose of this scoping review was to summarize the current CAM systems, parameters, and setting changes, and their effects on different outcomes of milled indirect restorations and aspects related to their manufacture. MATERIAL AND METHODS The protocol of this review is available online (https://osf.io/x28ps/). Studies that used at least 2 different parameters (CAM units, number of axes, digital spacers, or protocols with different rotatory instruments, grit-sizes, milling speed, or others) for milling indirect restorations were included. A structured search up to July 2023 was performed by 2 independent reviewers for articles written in English in LILACS, MEDLINE via PubMed, EMBASE, Web of Science, and Scopus. RESULTS Of 1546 studies identified, 22 were included in the review. Discrepancies were found between the planned and actual measured cement space, with a decreasing linear relationship impacting restoration adaptation at different points. The CEREC MC XL milling machine was the most used system in the included studies, with variations in bur types, milling modes, and number of burs uses affecting internal fit and surface trueness. The results demonstrated the better adaptation of restorations made with 5-axis over 3-axis milling machines. Lithium disilicate and zirconia were the most commonly used materials, and crowns and inlays were popular designs. Marginal and internal adaptation were the primary outcomes assessed using the various techniques. CONCLUSIONS The study presented a comprehensive exploration of CAM systems and parameters, and their influence on indirect restorations. The planned cement space was not properly reproduced by the milling. Bur characteristics can affect restoration fit and trueness. The 5-axis units seem to result in better-adapted restorations compared with 3- and 4-axis units.
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Affiliation(s)
- Rafaela Oliveira Pilecco
- Postgraduate student, Postgraduate Program in Oral Sciences (Prosthodontics Units), Faculty of Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Brazil
| | - Renan Vaz Machry
- Postdoctoral student, Postgraduate Program in Oral Sciences (Prosthodontics Units), Faculty of Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Brazil
| | - Andrea Baldi
- Postdoctoral student, Department of Surgical Sciences, Dental School, Turin, Italy
| | - João Paulo Mendes Tribst
- Assistant Professor, Department of Reconstructive Oral Care, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, North Holland, The Netherlands.
| | - Rafael Sarkis-Onofre
- Associate Professor, Graduate Program in Dentistry, Meridional Faculty, IMED, Passo Fundo, Brazil
| | - Luiz Felipe Valandro
- Full Professor, Postgraduate Program in Oral Sciences (Prosthodontics Unit), Faculty of Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Brazil
| | - Cornelis Johannes Kleverlaan
- Full Professor, Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, North Holland, The Netherlands
| | - Nicola Scotti
- Associate Professor, Department of Surgical Sciences, Dental School, Turin, Italy
| | - Gabriel Kalil Rocha Pereira
- Adjunct Professor, Postgraduate Program in Oral Sciences (Prosthodontics Unit), Faculty of Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Brazil
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Dimitrova M, Vlahova A, Kazakova R. Assessment of CAD/CAM Fabrication Technologies for Post and Core Restorations-A Narrative Review. MEDICINA (KAUNAS, LITHUANIA) 2024; 60:748. [PMID: 38792931 PMCID: PMC11123209 DOI: 10.3390/medicina60050748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 04/27/2024] [Accepted: 04/28/2024] [Indexed: 05/26/2024]
Abstract
The primary objective of this study is to conduct a comprehensive review of the existing literature that discusses research on post and core restorations, covering aspects such as their composition, manufacturing methods, and clinical effectiveness. The methodology employed in this review encompasses the implementation of a well-defined search strategy, the establishment of criteria for inclusion and exclusion, and the selection of relevant studies to summarize their findings. To gather relevant literature published between 1993 and 2023, the research team conducted separate searches on PubMed, Web of Science, and Embase databases. In total, 168 titles were initially retrieved from these electronic databases. By applying the predefined exclusion criteria, the researchers identified 73 articles that specifically address the conventional and computer-aided design/computer-aided manufacturing (CAD/CAM) technologies employed in post and core restorations. These treatments are commonly employed to restore teeth that have received endodontic therapy and subsequently experienced loss of dental structure. The development of computerized technology for the creation of customized posts and cores has emerged as a straightforward and efficient alternative to traditional methods. The review synthesizes papers discussing the techniques and materials involved in CAD/CAM-based construction of post and cores. It explores strategies for restoring endodontically treated teeth, highlighting both direct and indirect approaches. Commonly mentioned materials include zirconia, composite resin, and hybrid ceramics. Despite the limited literature on CAD/CAM post and core procedures, the review emphasizes the necessity of further research to assess long-term outcomes and efficacy. Additionally, it suggests including implications for future research and clinical recommendations to enhance the depth and practical relevance of the review.
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Affiliation(s)
- Mariya Dimitrova
- Department of Prosthetic Dentistry, Faculty of Dental Medicine, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria; (A.V.); (R.K.)
| | - Angelina Vlahova
- Department of Prosthetic Dentistry, Faculty of Dental Medicine, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria; (A.V.); (R.K.)
- CAD/CAM Center of Dental Medicine, Research Institute, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria
| | - Rada Kazakova
- Department of Prosthetic Dentistry, Faculty of Dental Medicine, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria; (A.V.); (R.K.)
- CAD/CAM Center of Dental Medicine, Research Institute, Medical University of Plovdiv, 4000 Plovdiv, Bulgaria
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Kropfeld J, Berger L, Adler W, Schulz KL, Motel C, Wichmann M, Matta RE. Impact of Scanbody Geometry and CAD Software on Determining 3D Implant Position. Dent J (Basel) 2024; 12:94. [PMID: 38668006 PMCID: PMC11049057 DOI: 10.3390/dj12040094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2024] [Revised: 03/28/2024] [Accepted: 03/31/2024] [Indexed: 04/28/2024] Open
Abstract
The implementation of CAD software in the digital production of implant prosthetics stands as a pivotal aspect of clinical dentistry, necessitating high precision in the alignment of implant scanbodies. This study investigates the influence of scanbody geometry and the method of superimposing in CAD software when determining 3D implant position. A standardized titanium model with three bone-level implants was digitized to create reference STL files, and 10 intraoral scans were performed on Medentika and NT-Trading scanbodies. To determine implant position, the generated STL files were imported into the Exocad CAD software and superimposed-automatically and manually-with the scanbody geometries stored within the software's shape library. Position accuracy was determined by a comparison of the 3D-defined scanbody points from the STL matching files with those from the reference STL files. The R statistical software was used for the evaluation of the data. In addition, mixed linear models and a significance level of 0.05 were applied to calculate the p-values. The manual overlay method was significantly more accurate than the automatic overlays for both scanbody types. The Medentika scanbodies showed slightly superior precision compared to the NT-Trading scanbodies. Both scanbody geometry and the type of alignment in the CAD software significantly affect digital workflow accuracy. Manual verification and adjustment of the automatic alignment process are essential for precise implant positioning.
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Affiliation(s)
- Judith Kropfeld
- Department of Prosthodontics, University Hospital Erlangen, Glückstrasse 11, 91054 Erlangen, Germany; (J.K.); (L.B.); (C.M.); (M.W.)
| | - Lara Berger
- Department of Prosthodontics, University Hospital Erlangen, Glückstrasse 11, 91054 Erlangen, Germany; (J.K.); (L.B.); (C.M.); (M.W.)
| | - Werner Adler
- Institute of Medical Informatics, Biometry and Epidemiology (IMBE) of the Friedrich-Alexander-University, Erlangen-Nuremberg, Waldstrasse 6, 91054 Erlangen, Germany;
| | - Katja Leonie Schulz
- Department of Oral and Cranio-Maxillofacial Surgery, University Hospital Erlangen, Glückstrasse 11, 91054 Erlangen, Germany;
| | - Constantin Motel
- Department of Prosthodontics, University Hospital Erlangen, Glückstrasse 11, 91054 Erlangen, Germany; (J.K.); (L.B.); (C.M.); (M.W.)
| | - Manfred Wichmann
- Department of Prosthodontics, University Hospital Erlangen, Glückstrasse 11, 91054 Erlangen, Germany; (J.K.); (L.B.); (C.M.); (M.W.)
| | - Ragai Edward Matta
- Department of Prosthodontics, University Hospital Erlangen, Glückstrasse 11, 91054 Erlangen, Germany; (J.K.); (L.B.); (C.M.); (M.W.)
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Jang TJ, Yun HS, Hyun CM, Kim JE, Lee SH, Seo JK. Fully automatic integration of dental CBCT images and full-arch intraoral impressions with stitching error correction via individual tooth segmentation and identification. Med Image Anal 2024; 93:103096. [PMID: 38301347 DOI: 10.1016/j.media.2024.103096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 12/31/2023] [Accepted: 01/25/2024] [Indexed: 02/03/2024]
Abstract
We present a fully automated method of integrating intraoral scan (IOS) and dental cone-beam computerized tomography (CBCT) images into one image by complementing each image's weaknesses. Dental CBCT alone may not be able to delineate precise details of the tooth surface due to limited image resolution and various CBCT artifacts, including metal-induced artifacts. IOS is very accurate for the scanning of narrow areas, but it produces cumulative stitching errors during full-arch scanning. The proposed method is intended not only to compensate the low-quality of CBCT-derived tooth surfaces with IOS, but also to correct the cumulative stitching errors of IOS across the entire dental arch. Moreover, the integration provides both gingival structure of IOS and tooth roots of CBCT in one image. The proposed fully automated method consists of four parts; (i) individual tooth segmentation and identification module for IOS data (TSIM-IOS); (ii) individual tooth segmentation and identification module for CBCT data (TSIM-CBCT); (iii) global-to-local tooth registration between IOS and CBCT; and (iv) stitching error correction for full-arch IOS. The experimental results show that the proposed method achieved landmark and surface distance errors of 112.4μm and 301.7μm, respectively.
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Affiliation(s)
- Tae Jun Jang
- School of Mathematics and Computing (Computational Science and Engineering), Yonsei University, Seoul, South Korea
| | - Hye Sun Yun
- School of Mathematics and Computing (Computational Science and Engineering), Yonsei University, Seoul, South Korea.
| | - Chang Min Hyun
- School of Mathematics and Computing (Computational Science and Engineering), Yonsei University, Seoul, South Korea
| | - Jong-Eun Kim
- Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, South Korea
| | - Sang-Hwy Lee
- Department of Oral and Maxillofacial Surgery, Oral Science Research Center, College of Dentistry, Yonsei University, Seoul, South Korea
| | - Jin Keun Seo
- School of Mathematics and Computing (Computational Science and Engineering), Yonsei University, Seoul, South Korea
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El Osta N, Drancourt N, Auduc C, Veyrune JL, Nicolas E. Accuracy of conventional impressions and digital scans for implant-supported fixed prostheses in maxillary free-ended partial edentulism: An in vitro study. J Dent 2024; 143:104892. [PMID: 38367825 DOI: 10.1016/j.jdent.2024.104892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 02/13/2024] [Accepted: 02/15/2024] [Indexed: 02/19/2024] Open
Abstract
OBJECTIVES To evaluate the accuracy of conventional polyether impressions and digital scans produced by five intra-oral scanners (IOSs) in maxillary free-ended partial edentulism for long-span implant-supported prostheses. METHODS This in vitro study involved the impression of a maxillary model with free-end partial edentulism, in which six implants were placed before digitization using a desktop scanner to generate a digital reference model. Conventional impressions (Impregum Penta Soft, 3M) and digital scans with five IOSs (Trios 3 and 4, 3Shape; Primescan, Dentsply-Sirona; CS 3600, Carestream Dental; and i-500, Medit) were obtained. Conventional impressions were digitized using the same desktop scanner. Each digital STL file of conventional or digital impressions was superimposed over the reference STL file to enable comparison. Trueness was assessed by calculating angles and distance deviations. For precision, dispersions of values around their means were also measured. RESULTS The mean distance deviation was significantly higher for conventional impressions (454.24 ± 334.70 µm) than for IOSs (ranging from 160.98 ± 204.48 µm to 255.56 ± 395.89 µm) (p < 0.001). The mean angular deviation was high with conventional impressions (1.82 ± 1.51°), intermediate with CS 3600 (1.38 ± 1.42°), Primescan (1.37 ± 2.54°) and Trios 4 (1.30 ± 0.64°) scanners, and lower with I500 (0.97 ± 0.75°) and Trios 3 (1.01 ± 0.85°) scanners (p < 0.001). The dispersion of distance values around their means was lowest with Trios 3 and i-500, followed by CS3600, Primescan, and Trios 4, respectively, and higher for conventional impressions (p < 0.001). The dispersion of angular values was smallest with i-500, Trios 3, and Trios 4 compared with other groups and was highest with Primescan (p < 0.001). CONCLUSIONS Within the limits of the current study, Trios 3 scanner exhibited the highest accuracy, followed by i-500, Trios 4, CS 3600, Primescan, and conventional impressions respectively. IOSs might be reliable for the fabrication of an implant-supported prosthesis. In vivo studies are required to confirm these findings. CLINICAL SIGNIFICANCE Passive adaptation of the implant-supported framework is a challenge when rehabilitating patients with maxillary free-end partial edentulism. While Conventional impressions remain a reliable and validated technique, but IOSs demonstrated higher accuracy, suitable for the fabrication of long-span implant-supported prostheses in partially edentulous arch.
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Affiliation(s)
- Nada El Osta
- Department of Prosthodontics, UFR d'Odontologie, Centre de Recherche en Odontologie Clinique (CROC), University of Clermont Auvergne, Clermont-Ferrand, France.
| | - Noémie Drancourt
- Department of Prosthodontics, UFR d'Odontologie, Centre de Recherche en Odontologie Clinique (CROC), University of Clermont Auvergne, Clermont-Ferrand, France; CHU Clermont-Ferrand, Odontology Department, Clermont-Ferrand, France
| | - Chantal Auduc
- Department of Prosthodontics, UFR d'Odontologie, Centre de Recherche en Odontologie Clinique (CROC), University of Clermont Auvergne, Clermont-Ferrand, France; CHU Clermont-Ferrand, Odontology Department, Clermont-Ferrand, France
| | - Jean-Luc Veyrune
- Department of Prosthodontics, UFR d'Odontologie, Centre de Recherche en Odontologie Clinique (CROC), University of Clermont Auvergne, Clermont-Ferrand, France; CHU Clermont-Ferrand, Odontology Department, Clermont-Ferrand, France
| | - Emmanuel Nicolas
- Department of Prosthodontics, UFR d'Odontologie, Centre de Recherche en Odontologie Clinique (CROC), University of Clermont Auvergne, Clermont-Ferrand, France; CHU Clermont-Ferrand, Odontology Department, Clermont-Ferrand, France
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Garikano X, Amezua X, Iturrate M, Solaberrieta E. Evaluation of repeatability of different alignment methods to obtain digital interocclusal records: An in vitro study. J Prosthet Dent 2024; 131:709-717. [PMID: 36115710 DOI: 10.1016/j.prosdent.2022.07.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 07/20/2022] [Accepted: 07/20/2022] [Indexed: 10/14/2022]
Abstract
STATEMENT OF PROBLEM The alignment of the maxillary and mandibular digital scans obtained with an intraoral scanner (IOS) generates digital interocclusal records. Although the accuracy of maxillary and mandibular digital scans obtained from an IOS is widely studied, the accuracy of digital interocclusal records obtained with them is not; even less studied is the accuracy (trueness and precision) of the alignment methods that are available to obtain them. PURPOSE The purpose of this in vitro study was to assess the precision under repeatability conditions (repeatability) of the different alignment methods used to obtain digital interocclusal records. MATERIAL AND METHODS Digital scans of maxillary and mandibular casts of a dentate healthy adult were acquired with an IOS. Casts were then mounted in maximum intercuspal position in a semi-adjustable mechanical articulator (1801 AR Model PSH Articulator), and left and right occlusal digital scans were acquired with the IOS. Occlusal digital scans were repeated 7 times under repeatability conditions. After obtaining each pair of occlusal digital scans, the software program of the IOS automatically aligned the maxillary and mandibular digital scans with occlusal digital scans (TRI method), resulting in 7 digital interocclusal records composed of aligned maxillary and mandibular digital scans and occlusal digital scans. All 7 sets of aligned digital scans were exported and realigned in a dental computer-aided design software program by means of global and reference alignment methods (EXO-B and EXO-R methods, respectively). To assess the repeatability, the 7 aligned digital scan sets of each group were repositioned in the common coordinate system by aligning maxillary digital scans, and repeatability was calculated in terms of the distance between the vertices of the mandibular digital scans for each of the possible nonrepeating combinations of pairs (7C2=21). The repeatability was tested by using the Kruskal-Wallis test for nonparametric distribution followed by the Mann-Whitney U test and Bonferroni correction for pairwise comparisons (α=.05). RESULTS The median with interquartile range for the TRI alignment method was 47 (27) μm for the EXO-B method 41 (25) μm and 16 (5) μm for EXO-R. The Kruskal-Wallis test showed statistical difference between test groups (P<.05). The post hoc Dunn test with Bonferroni adjustment detected significant statistical differences between the EXO-R-TRI (P<.001) and EXO-R-EXO-B (P<.001) alignment methods. CONCLUSIONS This study found that the alignment method could influence the repeatability of digital interocclusal records. The reference best-fit alignment method (EXO-R) provided better repeatability.
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Affiliation(s)
- Xabier Garikano
- Assistant Professor, Department of Graphic Design and Engineering Projects, Faculty of Engineering Gipuzkoa, University of the Basque Country UPV/EHU, San Sebastian, Spain
| | - Xabier Amezua
- Research Assistant, Department of Graphic Design and Engineering Projects, Faculty of Engineering Gipuzkoa, University of the Basque Country UPV/EHU, San Sebastian, Spain; Assistant Professor, Department of Business Management, Faculty of Engineering Gipuzkoa, University of the Basque Country UPV/EHU, San Sebastian, Spain
| | - Mikel Iturrate
- Assistant Professor, Department of Graphic Design and Engineering Projects, Faculty of Engineering Gipuzkoa, University of the Basque Country UPV/EHU, San Sebastian, Spain
| | - Eneko Solaberrieta
- Associate Professor, Department of Graphic Design and Engineering Projects, Faculty of Engineering Gipuzkoa, University of the Basque Country UPV/EHU, San Sebastian, Spain.
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Wang ZY, Gong Y, Liu F, Chen D, Zheng JW, Shen JF. Influence of intraoral scanning coverage on the accuracy of digital implant impressions - An in vitro study. J Dent 2024; 143:104929. [PMID: 38458380 DOI: 10.1016/j.jdent.2024.104929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 02/15/2024] [Accepted: 03/05/2024] [Indexed: 03/10/2024] Open
Abstract
OBJECTIVES To evaluate the influence of intraoral scanning coverage (IOSC) on digital implant impression accuracy in various partially edentulous situations and predict the optimal IOSC. METHODS Five types of resin models were fabricated, each simulating single or multiple tooth loss scenarios with inserted implants and scan bodies. IOSC was subgrouped to cover two, four, six, eight, ten, and twelve teeth, as well as full arch. Each group underwent ten scans. A desktop scanner served as the reference. Accuracy was evaluated by measuring the Root mean square error (RMSE) values of scan bodies. A convolutional neural network (CNN) was trained to predict the optimal IOSC with different edentulous situations. Statistical analysis was performed using one-way ANOVA and Tukey's test. RESULTS For single-tooth-missing situations, in anterior sites, significantly better accuracy was observed in groups with IOSC ranging from four teeth to full arch (p < 0.05). In premolar sites, IOSC spanning four to six teeth were more accurate (p < 0.05), while in molar sites, groups with IOSC encompassing two to eight teeth exhibited better accuracy (p < 0.05). For multiple-teeth-missing situations, IOSC covering four, six, and eight teeth, as well as full arch showed better accuracy in anterior gaps (p < 0.05). In posterior gaps, IOSC of two, four, six or eight teeth were more accurate (p < 0.05). The CNN predicted distinct optimal IOSC for different edentulous scenarios. CONCLUSIONS Implant impression accuracy can be significantly impacted by IOSC in different partially edentulous situations. The selection of IOSC should be customized to the specific dentition defect condition. CLINICAL SIGNIFICANCE The number of teeth scanned can significantly affect digital implant impression accuracy. For missing single or four anterior teeth, scan at least four or six neighboring teeth is acceptable. In lateral cases, two neighboring teeth may suffice, but extending over ten teeth, including contralateral side, might deteriorate the scan.
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Affiliation(s)
- Zhen-Yu Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chengdu, Sichuan Province, China; West China School of Stomatology, Sichuan University, Chengdu, Sichuan Province, China
| | - Yu Gong
- College of Computer Science, Sichuan University, Chengdu, Sichuan Province, China
| | - Fei Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chengdu, Sichuan Province, China; West China School of Stomatology, Sichuan University, Chengdu, Sichuan Province, China; West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province, China
| | - Du Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chengdu, Sichuan Province, China; West China School of Stomatology, Sichuan University, Chengdu, Sichuan Province, China
| | - Jia-Wen Zheng
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chengdu, Sichuan Province, China; West China School of Stomatology, Sichuan University, Chengdu, Sichuan Province, China
| | - Jie-Fei Shen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chengdu, Sichuan Province, China; West China School of Stomatology, Sichuan University, Chengdu, Sichuan Province, China; West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan Province, China.
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Lopez D, Ziada H, Abubakr NH. Influence of thermal aging on the marginal integrity of computer aided design/computer aided manufacturing fabricated crowns. J Dent Sci 2024; 19:971-977. [PMID: 38618116 PMCID: PMC11010792 DOI: 10.1016/j.jds.2023.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/07/2023] [Indexed: 04/16/2024] Open
Abstract
Background/purpose The adaptation and marginal integrity of computer-aided designed and computer-aided manufactured (CAD/CAM) crowns after exposure to thermal aging need to be investigated. The present in-vitro study was designed to investigate the marginal integrity of CAD/CAM fabricated crowns cemented on extracted teeth after thermocycling aging. Materials and methods Twenty-six newly extracted human premolars were prepared for full-coverage CAD/CAM crowns and were divided into two groups (leucite-reinforced glass-ceramics and lithium disilicate glass-ceramics). Both crowns' groups were cemented using dual curing resin cement. All specimen margins were measured for marginal integrity using an imaging system 24 h post cementation; then after 1, 3, and 5 estimated clinical years (10,000, 30,000, and 50,000 thermocycles). Two-way ANOVA analysis were used to determine whether the mean value difference is significantly different (ɑ = 0.05). Results The average margin gaps recorded for leucite-reinforced glass-ceramic crowns were: 82.61 μm initial, and 91.02 μm after 5 estimated clinical year). For the lithium disilicate glass-ceramic crowns, the average margin gaps recorded were: 100.01 μm initial, and 120.21 μm after 5 estimated clinical year. During all measuring intervals, the leucite-reinforced glass-ceramic crown group had a lower marginal discrepancy. No statistically significant difference between the two groups was recorded. Conclusion After being subjected to thermocycling, both CAD/CAM ceramic crowns, exhibited an increase in their marginal discrepancy; the difference was within the accepted clinical range.
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Affiliation(s)
- Diana Lopez
- Department of Restorative Dentistry, Harvard School of Dental Medicine, Boston, MA, USA
| | - Hassan Ziada
- Clinical Sciences Department, School of Dental Medicine, University of Nevada, Las Vegas, NV, USA
| | - Neamat Hassan Abubakr
- Biomedical Sciences Department, School of Dental Medicine, University of Nevada, Las Vegas, NV, USA
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Mansoor MA, Sayed ME, Abdul HN, Zaidan MS, Hakami TM, Dighriri MA, Alqahtani SM, Alfaifi MA, Altoman MS, Jokhadar HF, AlResayes SS, AlWadei MH, Jundus AI, Komosany AM, Al-Najjar HZ. Comparative Accuracy of Intraoral and Extraoral Digital Workflows for Short Span Implant Supported Fixed Partial Denture Fabrication: An In Vitro Study. Med Sci Monit 2024; 30:e943706. [PMID: 38500254 PMCID: PMC10960501 DOI: 10.12659/msm.943706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 02/02/2024] [Indexed: 03/20/2024] Open
Abstract
BACKGROUND The advent of digital impressions using computer-aided design and manufacturing technology (CAD/CAM) has simplified and improved the fabrication of implant prostheses in dentistry. The conventional impression has several drawbacks, including tray selection, material type, impression technique, impression disinfection, and cast model storage. The inaccuracies caused by distortion and contraction of impression material can be minimized with digital impressions. This study aimed to compare digital dental impressions of 10 working casts made using the Pindex laser removable die system to fabricate parallel drill channels vs 10 working casts made using the Di-Lok plastic tray removable die system. MATERIAL AND METHODS An implant master die with 2 dental implant analogs was fabricated. Ten working casts using the Pindex laser removable die system with parallel drill channels and 10 working casts using the Di-Lok plastic tray removable die system were fabricated. The working casts were scanned using an extra-oral laboratory scanner and the implant master model was scanned with an intra-oral scanner. RESULTS The properties of the casts made using the 2 systems were evaluated and analyzed with ANOVA and post hoc Tukey test. The mean horizontal linear distances between A1B1 (P<0.021), A2B2 (P<0.018), C1D1 (P<0.026), C2D2 (P<0.03), B1C1 (P<0.01), and mean vertical distances between B1A2 (P<0.015), C1D2 (P<0.001), B1B2 (P<0.028), and C1C2 (P<0.001) were significantly different between the Pindex system and Di-Lok tray system as compared to intra-oral scans. CONCLUSIONS Complete digital workflow with intra-oral scans were more than the partial digital workflow with extra-oral scans for the Pindex system and Di-Lok tray systems.
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Affiliation(s)
- Manawar Ahmad Mansoor
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Mohammed E. Sayed
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Hina Naim Abdul
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | | | | | | | - Saeed M. Alqahtani
- Department of Prosthetic Dental Sciences, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Mohammed A. Alfaifi
- Department of Prosthetic Dental Sciences, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Majed S. Altoman
- Department of Prosthetic Dental Sciences, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Hossam F. Jokhadar
- Department of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Saad Saleh AlResayes
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Mohammed H. AlWadei
- Department of Restorative Dental Science, College of Dentistry, King Khalid University, Abha, Saudi Arabia
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Yoshiga C, Doi K, Oue H, Kobatake R, Kawagoe M, Umehara H, Tsuga K. Utility of intraoral scanner imaging for dental plaque detection. Imaging Sci Dent 2024; 54:43-48. [PMID: 38571782 PMCID: PMC10985524 DOI: 10.5624/isd.20230180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/01/2023] [Accepted: 10/11/2023] [Indexed: 04/05/2024] Open
Abstract
Purpose Oral hygiene, maintained through plaque control, helps prevent periodontal disease and dental caries. This study was conducted to examine the accuracy of plaque detection with an intraoral scanner (IOS) compared to images captured with an optical camera. Materials and Methods To examine the effect of color tone, artificial tooth resin samples were stained red, blue, and green, after which images were acquired with a digital single-lens reflex (DSLR) camera and an IOS device. Stained surface ratios were then determined and compared. Additionally, the deviation rate of the IOS relative to the DSLR camera was computed for each color. In the clinical study, following plaque staining with red disclosing solution, the staining was captured by the DSLR and IOS devices, and the stained area on each image was measured. Results The stained surface ratios did not differ significantly between DSLR and IOS images for any color group. Additionally, the deviation rate did not vary significantly across colors. In the clinical test, the stained plaque appeared slightly lighter in color, and the delineation of the stained areas less distinct, on the IOS compared to the DSLR images. However, the stained surface ratio was significantly higher in the IOS than in the DSLR group. Conclusion When employing IOS with dental plaque staining, the impact of color was minimal, suggesting that the traditional red stain remains suitable for plaque detection. IOS images appeared relatively blurred and enlarged relative to the true state of the teeth, due to inferior sharpness compared to camera images.
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Affiliation(s)
- Chihiro Yoshiga
- Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kazuya Doi
- Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Hiroshi Oue
- Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Reiko Kobatake
- Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Maiko Kawagoe
- Department of Clinical Practice and Support, Dental Section, Hiroshima University Hospital, Hiroshima, Japan
| | - Hanako Umehara
- Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kazuhiro Tsuga
- Department of Advanced Prosthodontics, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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Azpiazu-Flores FX, Swain VL. Defining challenging areas of the preparation finish line by using an open-source 3D modeling computer program: A tip to simplify margin identification by the dental laboratory technician. J Prosthet Dent 2024; 131:537-539. [PMID: 37330358 DOI: 10.1016/j.prosdent.2023.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/11/2023] [Accepted: 05/12/2023] [Indexed: 06/19/2023]
Affiliation(s)
- Francisco X Azpiazu-Flores
- Assistant Professor, Department of Restorative Dentistry, Dr Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Canada.
| | - Vanessa L Swain
- Department Head and Associate Professor, Department of Restorative Dentistry, Dr Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Canada
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Yehia A, Abo El Fadl A, El Sergany O, Ebeid K. Effect of different span lengths with different total occlusal convergences on the accuracy of intraoral scanners. J Prosthodont 2024; 33:252-258. [PMID: 36988154 DOI: 10.1111/jopr.13686] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 03/30/2023] Open
Abstract
PURPOSE The aim was to assess the effect of span lengths and total occlusal convergence (TOC) on the accuracy of intraoral scanners . MATERIALS AND METHODS Two typodont acrylic teeth models were prepared to receive fixed dental prostheses with three different span lengths. Span 1: between maxillary canines; span 2: between maxillary second premolars; and span 3: between maxillary second molars. In the first model, prepared teeth had a TOC of 12°, whereas, in the second model, teeth had a TOC of 20°. Each model was scanned 10 times using 4 different intraoral scanners (Omnicam, Primescan, Trios 4, and Medit i500). The STL files from the scans were compared to the reference models (trueness) and within each test group (precision) using a 3D comparison software. Data were then statistically analyzed. RESULTS Regarding trueness, no significant differences were found among Primescan (32.58 ± 13.08), Trios 4 (32.33 ± 12.19), and Medit i500 (32.26 ± 9.57). However, all showed significantly better trueness than Omnicam (35.70 ± 8.35) (p < 0.001). The highest values were found in scans between the second molars (47.42 ± 3.94), followed by scans between second premolars (28.42 ± 3.78), and the highest trueness was found in scans between the canines (23.80 ± 3.85). For TOC, 12° had a significantly higher value than 20° (p < 0.001). Regarding precision, the highest values were found with Omnicam (29.84 ± 3.89), followed by Medit i500 (28.04 ± 2.94), then Trios 4 (25.64 ± 3.11), and Primescan (24.69 ± 5.25). The highest values and least precision were found in scans between the second molars (28.97 ± 5.27) and scans between second premolars (27.59 ± 3.97), whereas the highest precision was found in scans between the canines (24.60 ± 2.04). For TOC, 12° had significantly higher values than 20° (p < 0.001). CONCLUSIONS Intraoral scans are directly affected by scanner type, TOC, and scan spans. All tested scanners showed clinically acceptable results even for long-span restorations.
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Affiliation(s)
- Ashraf Yehia
- Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
| | - Ahmad Abo El Fadl
- Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
| | - Omar El Sergany
- Department of Fixed Prosthodontics, Faculty of Dentistry, British University in Egypt, Cairo, Egypt
| | - Kamal Ebeid
- Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
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Yehia A, Al-Zordk W, Elsherbini A, Sakrana AA. A microcomputed tomography analysis of adaptation in premolars with flared root canals restored with different digitally custom fabricated post materials. J Prosthet Dent 2024; 131:457.e1-457.e9. [PMID: 38212155 DOI: 10.1016/j.prosdent.2023.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 12/03/2023] [Accepted: 12/06/2023] [Indexed: 01/13/2024]
Abstract
STATEMENT OF PROBLEM Preserving and strengthening the remaining tooth structure of compromised flared root canals after endodontic treatment is challenging. PURPOSE The purpose of this in vitro study was to compare the adaptation of milled polymer- infiltrated ceramic, fiber-reinforced composite resin, and high-performance semicrystalline thermoplastic resin posts as used to restore mandibular premolars with flared root canals. MATERIAL AND METHODS Forty sound mandibular premolars were randomly divided into 4 groups: custom Vita Enamic (CV), custom fiber-reinforced composite resin (CF), custom polyetherketoneketone (CP), and prefabricated fiber (RF) posts. After endodontic treatment, each tooth was sectioned 1.5 mm occlusal to the cementoenamel junction. Then, the post space was prepared and flared, except the RF group, to a depth of 9 mm. The post space in RF group was prepared with a post drill. For the CV, CF, and CP groups, the posts were milled, finished, and cemented to their corresponding teeth. Each tooth was scanned using a microcomputed tomography device, and the reconstructed images were analyzed in mesiodistal, buccolingual, and horizontal planes. The cement thickness, cement volume, and volume of voids were measured. The data were analyzed using 3-way ANOVA (cement thickness) and 2-way ANOVA (cement volume and voids volume) tests followed by the post hoc Tukey test (α=.05). RESULTS The 3-way ANOVA test revealed a significant interaction (P<.001) between material type, section, and surface on the cement thickness. The mean cement thickness in the RF group was significantly higher than in the CV group (P=.001) and CF group (P=.005). The least mean cement thickness was at the apical section followed by the cervical and middle sections. Regarding cement volume, the 2-way ANOVA test showed statistically significant interaction between material type and section. The mean cement volume in the RF group was significantly lower than in the CV group (P=.001), CF group (P=.001), and CP group (P=.001). The highest mean cement volume was in the cervical section followed by the middle and apical sections. The 2-way ANOVA test showed statistically significant interaction (P<.001) between material type and section on the volume of voids. Significant differences were found between the mean volume of voids at the cervical and middle sections (P=.001) and the cervical and apical sections (P=.002). CONCLUSIONS Compared with prefabricated fiber posts, digitally fabricated polymer-infiltrated ceramic and fiber-reinforced composite resin posts had a thinner cement layer with minimal thickness at the apical section. The digitally fabricated posts had higher cement volume, especially at the cervical section, than prefabricated fiber posts. High volumes of voids were related to the cervical section of all tested posts.
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Affiliation(s)
- Ahmed Yehia
- Graduate student, Department of Fixed Prosthodontics, Mansoura University, Mansoura, Dkahlia, Egypt
| | - Walid Al-Zordk
- Associate professor, Department of Fixed Prosthodontics, Mansoura University, Mansoura, Dkahlia, Egypt; and Department of Fixed Prosthodontics, Horus University, New Damietta, Egypt
| | - Ahmed Elsherbini
- Graduate student, Department of Oral-Maxillofacial Surgery, Dentistry and Orthodontics, The University of Tokyo, Tokyo, Japan
| | - Amal Abdelsamad Sakrana
- Professor, Department of Fixed Prosthodontics, Mansoura University, Mansoura, Dkahlia, Egypt; and Department of Fixed Prosthodontics, Horus University, New Damietta, Egypt.
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Baek JH. Potential Application of Non-Invasive Optical Imaging Methods in Orthodontic Diagnosis. J Clin Med 2024; 13:966. [PMID: 38398279 PMCID: PMC10889225 DOI: 10.3390/jcm13040966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 02/04/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
During orthodontic treatment, the early diagnosis of microscopic changes in soft and hard tissues, including periodontal tissue, is very important to prevent iatrogenic side effects like root resorption and periodontal diseases. Cervical periodontal tissue is the most critical area that reacts first to mal-habits or orthodontic forces, and it is also the place where bacteria deposits in the early stage of periodontal diseases. The early diagnosis of hard tissue changes, such as demineralization, is also very important in maintaining a patient's health during orthodontic treatment. Many diagnostic devices, including radiographic equipment and intra-oral scanners, are helpful in diagnosing these problems, but have certain limitations in invasiveness and precision. The purpose of this study is to verify the possible utilities of non-invasive diagnostic devices in the orthodontic field that can compensate for these limitations. For this, non-invasive optical diagnostic devices, including optical coherence tomography and optical Doppler tomography, were used in vivo with animal and human examination for hard and soft tissues. These devices can provide real-time three-dimensional images at the histological scale. The results of this study verified these devices can be used in clinical practice during orthodontic treatment and introduced a new diagnostic paradigm differentiating microstructural changes in tissues in orthodontic diagnosis.
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Affiliation(s)
- Jae Ho Baek
- F.E.S. Research Lab., Ulsan 44705, Republic of Korea
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Mangano FG, Cianci D, Pranno N, Lerner H, Zarone F, Admakin O. Trueness, precision, time-efficiency and cost analysis of chairside additive and subtractive versus lab-based workflows for manufacturing single crowns: An in vitro study. J Dent 2024; 141:104792. [PMID: 38013004 DOI: 10.1016/j.jdent.2023.104792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 11/21/2023] [Accepted: 11/23/2023] [Indexed: 11/29/2023] Open
Abstract
PURPOSE To evaluate the trueness, precision, time efficiency, and cost of three different workflows for manufacturing single crowns (SCs). METHODS A plaster model with a prepared tooth (#15) was scanned with an industrial scanner, and an SC was designed in computer-assisted-design (CAD) software. Ten SCs were printed with a hybrid composite (additive chairside) and a stereolithographic (SLA) printer (Dfab®), 10 SCs were milled in lithium disilicate (subtractive chairside) using a chairside milling unit (inLab MC XL®), and 10 SCs were milled in zirconia (lab-based) using a five-axis laboratory machine (DWX-52D®). All SCs were scanned with the same scanner after polymerization/sinterization. Each scan was superimposed to the marginal area of the original CAD file to evaluate trueness: absolute average (ABS AVG), root mean square (RMS), and (90˚-10˚)/2 percentile were calculated for each group. Marginal adaptation and quality of the occlusal and interproximal contact points were also investigated by two prosthodontists on 3D printed and plaster models. Finally, the three workflows' time efficiency and costs were evaluated. RESULTS Additive chairside and subtractive lab-based SCs had significantly better marginal trueness than subtractive chairside SCs in all three parameters (ABS AVG, p < 0.01; RMS, p < 0.01; [90˚-10˚]/2, p < 0.01). However, the two prosthodontists found no significant differences between the three manufacturing procedures in the quality of the marginal closure (p = 0.186), interproximal (p = 0.319), and occlusal contacts (p = 0.218). Both time efficiency and cost show a trend favoring the chairside additive workflow. CONCLUSIONS Chairside additive technology seems to represent a valid alternative for manufacturing definitive SCs, given the high marginal trueness, precision, workflow efficiency and low costs. STATEMENT OF CLINICAL RELEVANCE Additive chairside manufacturing of definitive hybrid composite SCs is now possible and shows high accuracy, time efficiency, and competitive cost.
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Affiliation(s)
- Francesco Guido Mangano
- Department of Pediatric, Preventive Dentistry and Orthodontics, Sechenov First State Medical University, Moscow, Russia.
| | | | - Nicola Pranno
- Department of Oral and Maxillofacial Sciences, Sapienza University, Rome, Italy
| | - Henriette Lerner
- Department of Oral, Maxillofacial and Plastic Surgery, Goethe University, Frankfurt, Germany
| | - Fernando Zarone
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, University Federico II, Naples, Italy
| | - Oleg Admakin
- Department of Pediatric, Preventive Dentistry and Orthodontics, Sechenov First State Medical University, Moscow, Russia
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Cheng L, Feng Z, Hao Z, Si M, Yuan R, Feng Z. Molar distalization in orthodontics: a bibliometric analysis. Clin Oral Investig 2024; 28:123. [PMID: 38286861 PMCID: PMC10824817 DOI: 10.1007/s00784-024-05520-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 01/17/2024] [Indexed: 01/31/2024]
Abstract
OBJECTIVES The study endeavors to undertake a bibliometric analysis on molar distalization, with the objective of illuminating its evolutionary trajectory, current status, and prognosticating future research hotspots and trends. MATERIAL AND METHODS A comprehensive exploration of the literature on molar distalization was carried out by conducting a search in the Web of Science (WOS) core database of the University of Hong Kong Electronic Library. The search for topic terms employed included "molar distalization," "molar distalisation," "move molar distally," "molar distal movement," and "molar backwards." The search results were subsequently subjected to meticulous analysis using CiteSpace software. This analysis encompassed various facets such as the citation count; the geographical distribution of the countries, institutions, and journals responsible for publishing the articles; the distribution of the authors; the utilization of keywords within the articles; and the analysis of references. RESULTS A total of 516 articles were included in the analysis. The top 5 countries in terms of the number of published papers were the United States (USA), South Korea, Turkey, Italy, and Germany, and the top 5 institutions in terms of the number of published papers were Kyung Hee University, A.T. Still University of Health Sciences, Catholic University of Korea, Seoul St. Mary's Hospital, and Universidade de Sao Paulo. The top 5 authors in terms of the number of published papers were Park, Kook, Bayome, Janson, and Lee. There was little cooperation overall. The top 3 journals in terms of the most published related articles were all orthodontic-related journals. After molar distalization and anchorage, the most frequently used keywords were distalization, movement, and pendulum appliance. Kinzinger GSM is the most frequently cited author in references, and one of his articles also has the highest centrality score in references. CONCLUSIONS As the tides of time shift and scholars display an ever-growing dedication to unraveling the intricacies of this therapeutic modality, the realm of molar distalization has undergone notable advancements in technology. Initially, the traditional appliance suffered from aesthetic drawbacks and discomfort. However, contemporary iterations of the appliance have transcended these limitations, boasting enhanced elegance and convenience while concurrently elevating their efficacy. Nevertheless, limitations of current appliances, including their durability and propensity for recurrence post-treatment, continue to necessitate further advancement. Hence, the ongoing scientific inquiry aims to delve deeper into refining treatment modalities and fabricating cutting-edge appliances within this realm. CLINICAL RELEVANCE This study holds the potential to significantly enhance the ability of orthodontists to devise treatment protocols and offer state-of-the-art clinical recommendations, thereby empowering them to deliver advanced and refined orthodontic interventions.
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Affiliation(s)
- Lin Cheng
- Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, China
| | - Zezhou Feng
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, School and Hospital of Stomatology, Shanxi Medical University, Taiyuan, China
| | - Zhaonan Hao
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, School and Hospital of Stomatology, Shanxi Medical University, Taiyuan, China
| | - Minmin Si
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, School and Hospital of Stomatology, Shanxi Medical University, Taiyuan, China
| | - Rui Yuan
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, School and Hospital of Stomatology, Shanxi Medical University, Taiyuan, China
| | - Zhiyuan Feng
- Department of Orthodontics, Shanxi Provincial People's Hospital, The Fifth Clinical Medical College of Shanxi Medical University, Taiyuan, China.
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Li R, Zhu C, Chu F, Yu Q, Fan D, Ouyang N, Jin Y, Guo W, Xia L, Feng Q, Fang B. Deep learning for virtual orthodontic bracket removal: tool establishment and application. Clin Oral Investig 2024; 28:121. [PMID: 38280038 DOI: 10.1007/s00784-023-05440-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 11/15/2023] [Indexed: 01/29/2024]
Abstract
OBJECTIVE We aimed to develop a tool for virtual orthodontic bracket removal based on deep learning algorithms for feature extraction from bonded teeth and to demonstrate its application in a bracket position assessment scenario. MATERIALS AND METHODS Our segmentation network for virtual bracket removal was trained using dataset A, containing 978 bonded teeth, 20 original teeth, and 20 brackets generated by scanners. The accuracy and segmentation time of the network were tested by dataset B, which included an additional 118 bonded teeth without knowing the original tooth morphology. This tool was then applied for bracket position assessment. The clinical crown center, bracket center, and orientations of separated teeth and brackets were extracted for analyzing the linear distribution and angular deviation of bonded brackets. RESULTS This tool performed virtual bracket removal in 2.9 ms per tooth with accuracies of 98.93% and 97.42% (P < 0.01) in datasets A and B, respectively. The tooth surface and bracket characteristics were extracted and used to evaluate the results of manually bonded brackets by 49 orthodontists. Personal preferences for bracket angulation and bracket distribution were displayed graphically and tabularly. CONCLUSIONS The tool's efficiency and precision are satisfactory, and it can be operated without original tooth data. It can be used to display the bonding deviation in the bracket position assessment scenario. CLINICAL SIGNIFICANCE With the aid of this tool, unnecessary bracket removal can be avoided when evaluating bracket positions and modifying treatment plans. It has the potential to produce retainers and orthodontic devices prior to tooth debonding.
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Affiliation(s)
- Ruomei Li
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, 500 Quxi Road, Shanghai, 200011, China
| | - Cheng Zhu
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, 500 Quxi Road, Shanghai, 200011, China
| | - Fengting Chu
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, 500 Quxi Road, Shanghai, 200011, China
| | - Quan Yu
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, 500 Quxi Road, Shanghai, 200011, China
| | - Di Fan
- School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Ningjuan Ouyang
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, 500 Quxi Road, Shanghai, 200011, China
| | - Yu Jin
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, 500 Quxi Road, Shanghai, 200011, China
| | - Weiming Guo
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, 500 Quxi Road, Shanghai, 200011, China
| | - Lunguo Xia
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, 500 Quxi Road, Shanghai, 200011, China.
| | - Qiping Feng
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, 500 Quxi Road, Shanghai, 200011, China.
| | - Bing Fang
- Department of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, 500 Quxi Road, Shanghai, 200011, China.
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Tamim H, Usumez A, Franzen R. Effectiveness of laser-assisted gingival troughing and conventional gingival displacement methods in fixed prosthodontics: A systematic review. J Prosthet Dent 2024:S0022-3913(23)00817-X. [PMID: 38212156 DOI: 10.1016/j.prosdent.2023.11.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 11/21/2023] [Accepted: 11/21/2023] [Indexed: 01/13/2024]
Abstract
STATEMENT OF PROBLEM High-level evidence that gingival troughing using dental lasers has better outcomes for the management of gingival tissue surrounding prepared teeth compared with conventional gingival displacement methods is lacking. PURPOSE The purpose of this systematic review was to review in vivo studies on gingival troughing using dental lasers to compare achieved gingival displacement, influence on periodontal health, and other relevant clinical parameters with different existing gingival displacement methods. MATERIAL AND METHODS The study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement and identified studies through January 2022. An electronic search was conducted on the digital databases PubMed/MEDLINE, Web of Science, Scopus, and Embase to identify relevant studies with no limit on publication year. RESULTS Nine studies were included in this systematic review. Five studies measured achieved horizontal gingival displacement, where lasers show the highest pooled mean of 0.53 mm, among all other displacement methods. Six of the 9 included studies measured periodontal health parameters, with a follow-up time up to 1 year, and other clinically relevant parameters: hemorrhagic control, time needed, ease of use, tooth mobility, pain, and tooth hypersensitivity. CONCLUSIONS Gingival displacement and bleeding control appeared to be better achieved using lasers. The time needed to achieve gingival displacement was shortest and easiest with lasers. Lasers resulted in either less or comparable gingival recession, lower impact on tooth hypersensitivity, and less pain during the procedure than other methods.
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Affiliation(s)
- Hazem Tamim
- Prosthodontics Specialist, Master of Science in Lasers in Dentistry, Doha, Qatar.
| | | | - Rene Franzen
- Associate Professor, Department of Operative Dentistry, Periodontology and Preventive Dentistry, Medical Faculty, RWTH Aachen University, Aachen, Germany; Scientific Director, AALZ Aachen Dental Laser Center, Aachen, Germany; and Head, Study Program Lasers in Dentistry, Dental Department, Sigmund Freud University (SFU), Vienna, Austria
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Okamoto A, Karibe H, Tanaka S, Kawakami T, Shinya A. Reliability of mixed dentition space analysis using a digital model obtained from an optical impression: a preliminary study. BMC Res Notes 2024; 17:12. [PMID: 38167562 PMCID: PMC10763159 DOI: 10.1186/s13104-023-06678-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 12/18/2023] [Indexed: 01/05/2024] Open
Abstract
OBJECTIVE While mixed dentition space analysis is a common practice in pediatric dentistry, digital models created using an intraoral scanner are not as widely used in clinical settings. This preliminary study used a very small sample size with one reference model and aimed to (1) compare the accuracy of mixed dentition space analysis using a digital model obtained from an optical impression with that of conventional plaster model-based analysis and (2) assess inter-examiner differences. RESULTS The space required for the mandibular permanent canine and premolars and arch length discrepancy were calculated using each model. The largest significant difference between plaster- and digital model-based analyses was identified when the right arch length discrepancy was considered (-0.49 mm; 95% confidence interval: -0.95-0.03); however, the value was considered clinically insignificant. Significant inter-examiner differences were observed for six items of the plaster model; however, no such differences were observed when using the digital model. In conclusion, digital model space analysis may have the same level of accuracy as conventional plaster model analysis and likely results in smaller inter-examiner differences than plaster model analysis.
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Affiliation(s)
- Ayuko Okamoto
- Department of Pediatric Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University, 1-9-20 Fujimi Chiyoda-ku, Tokyo, 102-8159, Japan
| | - Hiroyuki Karibe
- Department of Pediatric Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University, 1-9-20 Fujimi Chiyoda-ku, Tokyo, 102-8159, Japan.
| | - Satoshi Tanaka
- Department of Pediatric Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University, 1-9-20 Fujimi Chiyoda-ku, Tokyo, 102-8159, Japan
| | - Tomomi Kawakami
- Department of Pediatric Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University, 1-9-20 Fujimi Chiyoda-ku, Tokyo, 102-8159, Japan
| | - Akikazu Shinya
- Department of Dental Materials Science, School of Life Dentistry at Tokyo, The Nippon Dental University, 1-9-20 Fujimi Chiyoda-ku, Tokyo, 102-8159, Japan
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Yilmaz H, Arınç H, Çakmak G, Atalay S, Donmez MB, Kökat AM, Yilmaz B. Effect of scan pattern on the scan accuracy of a combined healing abutment scan body system. J Prosthet Dent 2024; 131:110-118. [PMID: 35219530 DOI: 10.1016/j.prosdent.2022.01.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 01/04/2022] [Accepted: 01/04/2022] [Indexed: 11/30/2022]
Abstract
STATEMENT OF PROBLEM A recently introduced scan body combined with a contoured healing abutment enables digital scans of the implant while its healing abutment shapes the soft tissue for an appropriate emergence profile. However, information on the effect of different scan patterns on the scan accuracy of this new system is lacking. PURPOSE The purpose of this in vitro study was to evaluate the effect of scan pattern on the accuracy of digital implant scans by using a combined healing abutment-scan body system. MATERIAL AND METHODS A combined healing abutment-scan body system was secured on a single implant at the right first molar site in a dentate mandibular model. A master reference model was generated by scanning the model with an industrial light scanner. The model was then scanned with 4 different scan patterns (SP-A, SP-B, SP-C, and SP-D) by using an intraoral scanner (TRIOS 3). Test scans (n=8) were superimposed over the master reference model by using a metrology software, and distance and angular deviations were calculated. Distance and angular deviation data were analyzed with a multivariate analysis of variance and the Tukey honestly significant difference tests for trueness and precision (α=.05). RESULTS Distance deviations (trueness [P=.461] and precision [P=.533] deviations) in the scans were not significantly affected by the scan pattern. Scan pattern affected the trueness (P=.001) and precision (P=.002) when angular deviations were considered. In terms of trueness, SP-D resulted in the highest angular deviations in scans (P≤.031), while the difference in deviations in scans obtained by using other scan patterns was not significant (P≥.378). When angular deviation data were considered, SP-D resulted in lower scan precision than SP-A (P=.014) and SP-B (P=.007). The precision of scans using SP-C was similar to the precision of the scans made by using other scan patterns (P≥.055) in terms of angular deviations. CONCLUSIONS The scan accuracy of a combined healing abutment-scan body system was affected by the scan pattern. The scans performed with SP-D presented the lowest accuracy considering the angular deviation data and, therefore, may be the least favored among the patterns tested for scanning a combined healing abutment-scan body system.
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Affiliation(s)
- Hakan Yilmaz
- Orthodontist, Private Practice, İstanbul, Turkey
| | - Hakan Arınç
- Prosthodontist, Private Practice, İstanbul, Turkey
| | - Gülce Çakmak
- Buser Foundation Scholar for Implant Dentistry, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.
| | - Sevda Atalay
- Prosthodontist, Private Practice, İstanbul, Turkey
| | - Mustafa Borga Donmez
- Assistant Professor, Biruni University, Faculty of Dentistry, Department of Prosthodontics, İstanbul, Turkey; Visiting Researcher, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Ali Murat Kökat
- Professor, İstanbul Aydın University, Faculty of Dentistry, Department of Prosthodontics, İstanbul, Turkey
| | - Burak Yilmaz
- Associate Professor, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Associate Professor, Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland; Adjunct Professor, Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Ohio
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Zhou Y, Fu L, Zhang Z, Tang X. Effect of tooth color on the accuracy of intraoral complete arch scanning under different light conditions using a zirconia restoration model. J Prosthet Dent 2024; 131:145.e1-145.e8. [PMID: 37923645 DOI: 10.1016/j.prosdent.2023.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 10/02/2023] [Accepted: 10/03/2023] [Indexed: 11/07/2023]
Abstract
STATEMENT OF PROBLEM Information regarding the effect of tooth color under different light conditions on the accuracy of intraoral complete arch scanning is limited. PURPOSE The purpose of this in vitro study was to evaluate the effect of color and ambient light conditions on the accuracy of mandibular complete arch scanning with an intraoral scanner (IOS) using a zirconia restoration model with different shades. MATERIAL AND METHODS Five mandible dentition models with zirconia restorations of different shades were fabricated by computer-aided design and computer-aided manufacturing (CAD-CAM). The spectral reflectance and transmittance curves were collected with a spectrophotometer to determine color parameters (Rb, T, S+A, L*, a*, b*, C*, and h). Under 4 different lighting conditions: no light (ZL), natural light (NL), room light (RL), and chair light (CL), each model was scanned 10 times by using an IOS (TRIOS 3). Three-dimensional (3D) deviation analysis and a linear deviation analysis were performed for an accurate quantitative measurement of intraoral scanning. The multivariate test was used to determine significant differences in 3D deviation and linear deviation among groups. The multiple linear regression test was conducted to investigate the relevant independent factors of mean absolute 3D deviation. RESULTS The 3D deviation analysis showed that the mean absolute 3D deviation of 3M2 model scanning was the lowest (P<.001). Moreover, under CL and RL, the accuracy results from the 3M2 model scan were demonstrated as significantly better than the tested scans under other light conditions (P=.021). The result of the linear deviation analysis indicated that the variation in distance was only significant between the bilateral canines (P=.032). Ambient light conditions, C*, and h were factors influencing mean absolute 3D deviation (R2=0.593, P<.001). CONCLUSIONS Color change influenced the accuracy of intraoral mandibular complete arch scanning under different light conditions. This effect may be attributable to the interaction between the ambient light condition and color parameters such as C* and h.
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Affiliation(s)
- Yong Zhou
- Associate Professor, Department of Dental Implantology, College & Hospital of Stomatology, Anhui Medical University, Key Laboratory of Oral Diseases Research, Hefei, Anhui, PR China
| | - Lijuan Fu
- Graduate student, College & Hospital of Stomatology, Anhui Medical University, Key Laboratory of Oral Diseases Research, Hefei, Anhui, PR China
| | - Zhoujing Zhang
- Graduate student, College & Hospital of Stomatology, Anhui Medical University, Key Laboratory of Oral Diseases Research, Hefei, Anhui, PR China
| | - Xuyan Tang
- Associate Professor, Department of Prosthodontics, College & Hospital of Stomatology, Anhui Medical University, Key Laboratory of Oral Diseases Research, Hefei, Anhui, PR China..
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Saini RS, Alshadidi AAF, Rakhra J, Aldosari LIN, Hassan SAB, Quadri SA, Madhav V, Avetisyan A, Heboyan A. Text mining analysis of scientific literature on digital intraoral scanners in dentistry: Bibliometric analysis. Digit Health 2024; 10:20552076241260837. [PMID: 38840660 PMCID: PMC11151775 DOI: 10.1177/20552076241260837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 05/20/2024] [Indexed: 06/07/2024] Open
Abstract
Objective This study aimed to provide valuable insights into the current research status and gaps in digital intraoral scanner literature in dentistry. Methodology Scopus Search Query TITLE-ABS-KEY (intraoral AND scanners AND (dentistry OR digital AND dentistry)). The search query used in Scopus for the bibliometric analysis was "TITLE-ABS-KEY (intraoral AND scanners AND (dentistry OR digital AND dentistry))." This query indicates that the analysis focused on documents in which the title, abstract, or keywords contained the terms "intraoral," "scanners," and either "dentistry" or "digital dentistry." Results The analysis covers a timespan from 1998 to 2023 and includes 331 documents sourced from 136 publications. The annual growth rate of research in this field is reported to be 15.9%, indicating a steady increase over time. Among the top sources, the "Journal of Esthetic and Restorative Dentistry" and the "Journal of Prosthetic Dentistry" have the highest number of articles, indicating their significance in the field. Some notable authors and their corresponding statistics include WÖSTMANN B, with 15 articles and a fractionalized value of 3.16, and SCHLENZ MA, with 14 articles and a fractionalized value of 2.91. The United States has the highest number of articles, indicating a significant presence in research publications. Germany closely follows this, demonstrating a notable contribution to the scientific community. Conclusions This bibliometric analysis of intraoral scanners used in dentistry provided valuable insights into the current state of research and scholarly publications in this field. This analysis sheds light on the trends, patterns, and advancements in the use of these scanners in dental practice.
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Affiliation(s)
- Ravinder S Saini
- Department of Dental Technology, COAMS, King Khalid University, Abha, Saudi Arabia
| | | | | | | | - Saeed Awod Bin Hassan
- Department of Restorative Dental Sciences, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | | | - V.N.V Madhav
- Department of Prosthodontics, YCMM & RDF's Dental College and Hospital, Ahmednagar, India
| | - Anna Avetisyan
- Department of Therapeutic Stomatology, Faculty of Stomatology, Yerevan State Medical University after Mkhitar Heratsi, Yerevan, Armenia
| | - Artak Heboyan
- Department of Research Analytics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
- Department of Prosthodontics, Faculty of Stomatology, Yerevan State Medical University after Mkhitar Heratsi, Yerevan, Armenia
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Alfaraj A, Lin WS. Color reproduction trueness of 3D-printed full-color dental casts with scans derived from an intraoral scanner. J Prosthodont 2023. [PMID: 38112239 DOI: 10.1111/jopr.13821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 11/26/2023] [Accepted: 12/16/2023] [Indexed: 12/21/2023] Open
Abstract
PURPOSE To investigate the effects of shade tab color variations (tooth-colored vs. gingiva-colored) and surface treatment (application of mineral oil) on the trueness of color reproduction from dental shade tabs to 3D-printed full-color dental casts, using digital scans obtained from an intraoral scanner. MATERIALS AND METHODS Pristine tooth-colored (with 16 shade tabs) and gingiva-colored (with five shade tabs) shade guides were digitally scanned using an intraoral scanner, and subsequently, 3D-printed replicas were created using a full-color material jetting 3D printer. Three color measurements using a contact type digital spectrophotometer were recorded, including actual shade tabs (R0), dried 3D-printed study samples (RP1 ), and study samples with mineral oil application (RP2 ), in this study to calculate color differences between the actual shade tabs and 3D-printed ones. The CIEDE2000 formula was used to calculate the color differences (color reproduction trueness) between reference shade tabs and 3D-printed full-color study samples-without and with mineral oil, ∆E00 (RP1 ), and ∆E00 (RP2 ). ∆E00 (RP1 ) and ∆E00 (RP2 ) were compared with a 50:50% accessibility threshold (AT) and a 50:50% perceptibility threshold (PT). A grading system, based on the relative ranges of AT and PT, was employed. The percentage of samples falling into each color-matching category was then recorded. The data collected were subjected to statistical analysis, utilizing a mixed model ANOVA to evaluate the effects of shade tab color and mineral oil application on color differences, α = 0.05. RESULTS The application of mineral oil significantly affected the ∆E00 [F(1, 378) = 19.1, p = < 0.0001]. However, this effect was only significant for the gingiva-colored study samples; the mineral oil application significantly decreased color difference, showing ∆E00 (RP1 ) of 8.71 ± 3.78 and ∆E00 (RP2 ) of 6.55 ± 2.14 (p < 0.0001). For the tooth-colored groups, the mineral oil application did not yield any color difference, showing ∆E00 (RP1 ) of 7.05 ± 2.35 and ∆E00 (RP2 ) of 6.94 ± 2.35 (p = 0.497). In the absence of mineral oil, gingiva-colored samples revealed a significantly larger ∆E00 (RP1 ) of 8.71 ± 3.78 compared to tooth-colored samples at 7.05 ± 2.35 (p = 0.017). Conversely, mineral oil application rendered comparable ∆E00 (RP2 ) values between gingiva-colored (6.55 ± 2.14) and tooth-colored (6.94 ± 2.35) samples (p = 0.558). All 3D-printed full-color samples showed Grade 1 (extremely unacceptable mismatch) and Grade 2 (clearly unacceptable mismatch), regardless of the shades or the presence of mineral oil. CONCLUSIONS Utilizing an intraoral scanner to gather digital color data, along with an MJ 3D printer, offers the potential for producing 3D-printed full-color dental casts for prosthesis characterization in the dental laboratory. While mineral oil improves the color reproduction trueness of gingiva-colored objects, all 3D-printed full-color samples exhibited unacceptable mismatches when compared to their target objects. This underscores the need for future improvement in the digital color data acquisition process and color optimization protocols in 3D printing processes.
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Affiliation(s)
- Amal Alfaraj
- Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Indiana, USA
| | - Wei-Shao Lin
- Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Indiana, USA
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Jones B, Michou S, Chen T, Moreno-Betancur M, Kilpatrick N, Burgner D, Vannahme C, Silva M. Caries Detection in Primary Teeth Using Intraoral Scanners Featuring Fluorescence: Protocol for a Diagnostic Agreement Study. JMIR Res Protoc 2023; 12:e51578. [PMID: 38096003 PMCID: PMC10755660 DOI: 10.2196/51578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 10/29/2023] [Accepted: 10/30/2023] [Indexed: 12/31/2023] Open
Abstract
BACKGROUND Digital methods that enable early caries identification can streamline data collection in research and optimize dental examinations for young children. Intraoral scanners are devices used for creating 3D models of teeth in dentistry and are being rapidly adopted into clinical workflows. Integrating fluorescence technology into scanner hardware can support early caries detection. However, the performance of caries detection methods using 3D models featuring color and fluorescence in primary teeth is unknown. OBJECTIVE This study aims to assess the diagnostic agreement between visual examination (VE), on-screen assessment of 3D models in approximate natural colors with and without fluorescence, and application of an automated caries scoring system to the 3D models with fluorescence for caries detection in primary teeth. METHODS The study sample will be drawn from eligible participants in a randomized controlled trial at the Royal Children's Hospital, Melbourne, Australia, where a dental assessment was conducted, including VE using the International Caries Detection and Assessment System (ICDAS) and intraoral scan using the TRIOS 4 (3Shape TRIOS A/S). Participant clinical records will be collected, and all records meeting eligibility criteria will be subject to an on-screen assessment of 3D models by 4 dental practitioners. First, all primary tooth surfaces will be examined for caries based on 3D geometry and color, using a merged ICDAS index. Second, the on-screen assessment of 3D models will include fluorescence, where caries will be classified using a merged ICDAS index that has been modified to incorporate fluorescence criteria. After 4 weeks, all examiners will repeat the on-screen assessment for all 3D models. Finally, an automated caries scoring system will be used to classify caries on primary occlusal surfaces. The agreement in the total number of caries detected per person between methods will be assessed using a Bland-Altman analysis and intraclass correlation coefficients. At a tooth surface level, agreement between methods will be estimated using multilevel models to account for the clustering of dental data. RESULTS Automated caries scoring of 3D models was completed as of October 2023, with the publication of results expected by July 2024. On-screen assessment has commenced, with the expected completion of scoring and data analysis by March 2024. Results will be disseminated by the end of 2024. CONCLUSIONS The study outcomes may inform new practices that use digital models to facilitate dental assessments. Novel approaches that enable remote dental examination without compromising the accuracy of VE have wide applications in the research environment, clinical practice, and the provision of teledentistry. TRIAL REGISTRATION Australian New Zealand Clinical Trials Registry ACTRN12622001237774; https://www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=384632. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) DERR1-10.2196/51578.
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Affiliation(s)
- Bree Jones
- Murdoch Children's Research Institute, Royal Children's Hospital, Darley, Australia
- Melbourne Dental School, University of Melbourne, Melbourne, Australia
| | - Stavroula Michou
- Department of Odontology, School of Dentistry, University of Copenhagen, Copenhagen, Denmark
- 3Shape TRIOS A/S, Copenhagen, Denmark
| | - Tong Chen
- Melbourne Dental School, University of Melbourne, Melbourne, Australia
- Clinical Epidemiology & Biostatistics Unit, Murdoch Children's Research Institute, Royal Children's Hospital, Melbourne, Australia
| | - Margarita Moreno-Betancur
- Clinical Epidemiology & Biostatistics Unit, Murdoch Children's Research Institute, Royal Children's Hospital, Melbourne, Australia
- Department of Paediatrics, University of Melbourne, Melbourne, Australia
| | - Nicky Kilpatrick
- Murdoch Children's Research Institute, Royal Children's Hospital, Darley, Australia
- Department of Paediatrics, University of Melbourne, Melbourne, Australia
| | - David Burgner
- Murdoch Children's Research Institute, Royal Children's Hospital, Darley, Australia
- Department of Paediatrics, University of Melbourne, Melbourne, Australia
| | | | - Mihiri Silva
- Murdoch Children's Research Institute, Royal Children's Hospital, Darley, Australia
- Melbourne Dental School, University of Melbourne, Melbourne, Australia
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Porumb (Chifor) I, Leucuta DC, Nigoghossian M, Culic B, Lucaciu PO, Culic C, Badea IC, Leghezeu AN, Nicoara AG, Simu MR. Caries Lesion Assessment Using 3D Virtual Models by Examiners with Different Degrees of Clinical Experience. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:2157. [PMID: 38138260 PMCID: PMC10744345 DOI: 10.3390/medicina59122157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/04/2023] [Accepted: 12/11/2023] [Indexed: 12/24/2023]
Abstract
Background and Objectives: Dental caries is a preventable, reversible disease in its early stages. This study evaluated the intra-rater agreement of International Caries Assessment and Detection System (ICDAS) scores with Medit i500® and Omnicam® scanners versus traditional clinical examinations and the inter-rater agreement using the Omnicam® among senior dentists and dental students and between these two groups. Materials and Methods: A total of 24 patients aged between 21 and 34 years, randomly selected from dental students and interns, underwent four examinations (three intraoral scans and one clinical examination), and the corresponding ICDAS scores were recorded by a randomly selected rater out of the 31 available examiners. The examination team consisted of dental students, dentists with less than 3 years, and dentists with more than 5 years of clinical experience. The following inter- and intra-rater agreement tests for the ordinal data were chosen: Fleiss' kappa coefficient, Cohen's weighted kappa, and inter-class correlations. Results: For all examination techniques, there was statistically significant agreement for the experienced raters (p < 0.05). The highest positive interclass correlation was obtained for inter-rater agreement tests of 288 observations recorded by senior dentists: ICC = 0.969 (95% CI 0.949-0.981). Conclusions: Intra-rater reliability was excellent for Omnicam compared to clinical exams conducted by senior dentists but moderate for Medit i500. Although inter-rater agreement using Omnicam was poor between students and between senior dentists and students, it was excellent among senior dentists.
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Affiliation(s)
- Ioana Porumb (Chifor)
- Department of Preventive Dentistry, Iuliu Hatieganu University of Medicine and Pharmacy, 31 A Iancu Str., 400083 Cluj-Napoca, Romania; (I.C.B.)
- SC Chifor Meddent SRL, 9 Gh Doja Str., 400068 Cluj-Napoca, Romania
| | - Daniel-Corneliu Leucuta
- Department of Medical Informatics and Biostatistics, Iuliu Hatieganu University of Medicine and Pharmacy, 4 Pasteur Str., 400349 Cluj-Napoca, Romania;
| | - Marion Nigoghossian
- Faculty of Dental Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Avram Iancu Str., No 31, 400083 Cluj-Napoca, Romania; (A.-N.L.); (A.G.N.)
| | - Bogdan Culic
- Dental Propedeutics and Aesthetics Department, Iuliu Hatieganu University of Medicine and Pharmacy, 32 Clinicilor Str., 400006 Cluj-Napoca, Romania;
| | - Patricia Ondine Lucaciu
- Department of Oral Health, Iuliu Hatieganu University of Medicine and Pharmacy, 15 Victor Babes Str., 400012 Cluj-Napoca, Romania;
| | - Carina Culic
- Department of Odontology, Iuliu Hatieganu University of Medicine and Pharmacy, 33 Motilor Str., 400001 Cluj-Napoca, Romania
| | - Iulia Clara Badea
- Department of Preventive Dentistry, Iuliu Hatieganu University of Medicine and Pharmacy, 31 A Iancu Str., 400083 Cluj-Napoca, Romania; (I.C.B.)
| | - Alexa-Nicole Leghezeu
- Faculty of Dental Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Avram Iancu Str., No 31, 400083 Cluj-Napoca, Romania; (A.-N.L.); (A.G.N.)
| | - Andra Gabriela Nicoara
- Faculty of Dental Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Avram Iancu Str., No 31, 400083 Cluj-Napoca, Romania; (A.-N.L.); (A.G.N.)
| | - Meda-Romana Simu
- Department of Pediatric Dentistry, Iuliu Hatieganu University of Medicine and Pharmacy, 400083 Cluj-Napoca, Romania;
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Osman RB, Alharbi NM. Influence of scan technology on the accuracy and speed of intraoral scanning systems for the edentulous maxilla: An in vitro study. J Prosthodont 2023; 32:821-828. [PMID: 36571837 DOI: 10.1111/jopr.13633] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 12/18/2022] [Indexed: 12/27/2022] Open
Abstract
PURPOSE To compare the accuracy of three intraoral scanners in terms of trueness and precision relative to the scanner acquisition technology and scan capture mode. Scan speed of each scanner was also evaluated. MATERIALS AND METHODS An edentulous maxillary arch was digitized (reference model) and 3D-printed using an SLA-based 3D-printer (XFAB; DWS, Italy) (n = 10). Each model was scanned using three intraoral scanners, each with different scan technologies: confocal (Trios 3; 3Shape, Copenhagen, Denmark), parallel confocal (iTero; Align Technology), and triangulation (Medit i700). Scan time and scanning accuracy (trueness and precision) were calculated using digital subtraction technique (Geomagic Control X v2020, 3DSystems, USA). One-way analysis of variance (ANOVA) test was used to detect differences in trueness, precision, and scanning time between the tested groups (p < 0.05). RESULTS ANOVA results showed statistically significant differences in trueness, precision, and scan time among the tested groups. Confocal scanning technique (Trios 3) showed the highest trueness and precision (root mean square estimate [RMSE] 0.094 and 0.096, respectively) followed by iTero displaying parallel confocal technique (RMSE 0.113 and 0.133, respectively); the difference was not significant (p = 0.849, p = 0.488). Further, Trios showed the longest scanning time (100 s) compared to iTero and Medit i700 (p = 0.011 and 0.002, respectively). Medit i700 presenting triangulation scan technology revealed lowest trueness and precision (RMSE 0.268) (p = 0.000, p = 0.001) and fastest scan time (59 s) close to iTero (66 s) (p = 0.802). CONCLUSIONS Scanner technology had an influence on the accuracy and scan speed of the acquired intraoral scans. The Trios 3 scanner featuring the confocal acquisition technology displayed the highest trueness, precision, and longest scan time. Medit i700 IOS with triangulation acquisition concept featured the lowest trueness, precision, and fastest scan speed. There is no ideal scanner with the best combination of accuracy and scan speed.
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Affiliation(s)
- Reham Bassuni Osman
- Department of Prosthodontics, Faculty of Dentistry, Cairo University, Cairo, Egypt
| | - Nawal Murshed Alharbi
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
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Ashraf Y, Abo El Fadl A, Hamdy A, Ebeid K. Effect of different intraoral scanners and scanbody splinting on accuracy of scanning implant-supported full arch fixed prosthesis. J ESTHET RESTOR DENT 2023; 35:1257-1263. [PMID: 37310208 DOI: 10.1111/jerd.13070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 05/30/2023] [Accepted: 05/31/2023] [Indexed: 06/14/2023]
Abstract
OBJECTIVE This study evaluated the accuracy of different intraoral scanners (IOS) for scanning of implant-supported full arch fixed prosthesis with different implant angulations with and without scanbodies splinting. MATERIALS AND METHODS Two maxillary models were designed and fabricated to receive an all-on-four implant retained. The models were divided into two groups according to the angulation of the posterior implant (Group 1; 30 and Group 2; 45). Each group was then divided into three subgroups according to the type of IOS used: Subgroup C; Primescan, subgroup T; Trios4, and subgroup M; Medit i600. Then each subgroup was divided into two divisions according to scanning technique; division S: splinted and division N: nonsplinted. Ten scans were made by each scanner for every division. Trueness and precision were analyzed using Geomagic controlX analysis software. RESULTS Angulation had no significant effect on both the trueness (p = 0.854) and precision (p = 0.347). Splinting had a significant effect on trueness and precision (p < 0.001). Scanner type had a significant effect on trueness (p < 0.001) and precision (p < 0.001). There was no significant difference between trueness of Trios 4 (112.15 ± 12.85) and Primescan (106.75 ± 22.58). However, there was a significant difference when compared to trueness of Medit i600 (158.50 ± 27.65). For the precision results Cerec Primescan showed the highest precision (95.45 ± 33.21). There was a significant difference between the three scanners, precision of Trios4 (109.72 ± 19.24) and Medit i600 (121.21 ± 17.26). CONCLUSION Cerec Primescan has higher trueness and precision than Trios 4 and Medit i600 in full arch implants scanning. Splinting the scanbodies improve the accuracy of full arch implants scanning. CLINICAL SIGNIFICANCE Cerec Primescan and 3Shape Trios 4 can be used for scanning of All-on-four implant supported prosthesis when scanbodies are splinted using a modular chain device.
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Affiliation(s)
- Yasmine Ashraf
- Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
| | - Ahmad Abo El Fadl
- Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
| | - Amina Hamdy
- Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
| | - Kamal Ebeid
- Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt
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Klein M, Tuminelli FJ, Sallustio A, Giglio GD, Lerner H, Berg RW, Waltuch A. Full-arch restoration with the NEXUS IOS® system: A retrospective clinical evaluation of 37 restorations after a one year of follow-up. J Dent 2023; 139:104741. [PMID: 37832627 DOI: 10.1016/j.jdent.2023.104741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/08/2023] [Accepted: 10/10/2023] [Indexed: 10/15/2023] Open
Abstract
OBJECTIVES Report the results with a novel workflow of digital restoration for completely edentulous patients with implant supported full arch fixed dental prostheses (ISFDP). METHODS This multicenter retrospective clinical study was based on the evaluation from a cohort of 29 patients restored with 37 ISFDP designed and manufactured from the data captured by a direct intraoral scan, using a novel full digital system (NEXUS IOS®, Osteon Medical, a Keystone Dental Group company, Melbourne, Australia). Data was collected over a 3-year period, in six different dental centers. This study reported on the clinical parameters including: precision of marginal fit, functional and aesthetic integration of Nexus ISFDP. All patients were followed for a period of one year post delivery. Implant survival, biologic and prosthetic complications were assessed, at one year. A statistical analysis was conducted. RESULTS All 37 ISFDP were deemed clinically acceptable on insertion. Implant survival at one year was 100 %. The biologic and prosthetic complications were minimal during the follow-up period. CONCLUSIONS ISFDP, designed and manufactured using the NEXUS IOS® system, are clinically acceptable, with a low incidence of complications at one year. Long-term clinical studies are needed. STATEMENT OF CLINICAL RELEVANCE Within the limitations of this study (retrospective design, small patient sample, limited follow-up) the NEXUS IOS® system seems to represent a viable solution for the restoration of completely edentulous patients with ISFDP, in a full digital workflow.
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Affiliation(s)
| | - Frank J Tuminelli
- Diplomate & Director, American Board of Prosthodontics, Director, Graduate Prosthodontics VA NY Harbor Healthcare System, Adjunct Clinical Instructor, NYU Dental School, Clinical Assistant Professor, Hofstra Northwell School of Medicine, New York, NJ, USA
| | - Anthony Sallustio
- Chief of Maxillofacial Prosthetics, The Regional Craniofacial Center, St. Joseph's Hospital, Paterson, NJ, USA
| | | | - Henriette Lerner
- Academic Teaching and Research Institution of Johann Wolfgang Goethe-University, Frankfurt am Main, Private Practice, Baden, Germany
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Rotaru C, Bica EA, Butnărașu C, Săndulescu M. Three-Dimensional Scanning Accuracy of Intraoral Scanners for Dental Implant Scan Bodies-An Original Study. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:2037. [PMID: 38004086 PMCID: PMC10673438 DOI: 10.3390/medicina59112037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/15/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023]
Abstract
Background and Objectives: With the increased trend towards digitalization in dentistry, intraoral scanning has, to a certain extent, replaced conventional impressions in particular clinical settings. Trueness and precision are essential traits for optical impressions but have so far been incompletely explored. Materials and Methods: We performed a study to evaluate the differences in the three-dimensional spatial orientations of implant analogs on a stone cast when using an intraoral scanner compared to a dental laboratory scanner. We assessed the deviation of the intraoral scans compared to the laboratory scan for three standardized implant measurement plans and compared these results with control scans of the neighboring natural teeth. Results: We found no statistically significant correlation between the measurements at the scan body level and the landmarks chosen as controls on the neighboring natural teeth (p = 0.198). The values for the implant scans presented wider variation compared to the control scans. The difference between the implant and the control planes ranged from -0.018 mm to +0.267 mm, with a median of -0.011 mm (IQR: -0.001-0.031 mm). While most values fell within a clinically acceptable margin of error of 0.05 mm, 12.5% of the measurements fell outside of this acceptable range and could potentially affect the quality of the resulting prosthetic work. Conclusions: For single-unit implant-supported restorations, intraoral scanning might have enough accuracy. However, the differences that result when scanning with an intraoral scanner may affect the quality of prosthetic work on multiple implants, especially if they are screw-retained. Based on our results, we propose different adaptations of the prosthetic protocol to minimize the potential effect of errors that may occur during the digital workflow.
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Affiliation(s)
- Cristian Rotaru
- Doctoral School, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania;
| | - Elena Adina Bica
- Faculty of Dental Medicine, Titu Maiorescu University of Medicine, 040441 Bucharest, Romania
| | - Cristian Butnărașu
- MINEC—MegaGen International Network of Education & Clinical Research, 030925 Bucharest, Romania
| | - Mihai Săndulescu
- Department of Implant-Prosthetic Therapy, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, 020021 Bucharest, Romania
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