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Ye H, Ye J, Wang S, Wang Z, Geng J, Wang Y, Liu Y, Sun Y, Zhou Y. Comparison of the accuracy (trueness and precision) of virtual dentofacial patients digitized by three different methods based on 3D facial and dental images. J Prosthet Dent 2024; 131:726-734. [PMID: 35369981 DOI: 10.1016/j.prosdent.2022.01.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 10/18/2022]
Abstract
STATEMENT OF PROBLEM The accuracy of virtual dentofacial patients has been explored, but the accuracy of virtual patients established by using a straightforward and reliable method and the accuracy of different virtual patients are unclear. PURPOSE The purpose of this clinical study was to compare the accuracy of virtual dentofacial patients digitized by using registered-block impression, exposed anterior teeth, and cone beam computed tomography (CBCT) reconstruction methods based on 3-dimensional (3D) facial and dental images. MATERIAL AND METHODS From the 15 selected participants who needed CBCT scanning, 3 kinds of virtual dentofacial patients were established by using 3 registration methods based on digital dental casts: 3D facial images, CBCT data, and registered-block impression. Compared with actual measurement, 25 linear distances of all virtual dentofacial patients were selected and measured by using a software program, and 3 separate measurements were calculated by the same person. The 1-way analysis of variance (ANOVA) was used to compare the deviations among 3 kinds of virtual dentofacial patients (trueness) and the deviations within groups (precision). The 1-sample t test was used to compare the difference between the deviation and the ideal error of 0.00 (α=.05). RESULTS Compared with the actual measurement, the trueness of the average deviations for registered-block impression (1.02 ±1.24 mm) was better than that of exposed anterior teeth (2.35 ±1.71 mm) and CBCT reconstruction (2.86 ±1.61 mm). The precision of the average deviations for registered-block impression (1.29 ±1.43 mm) was better than that of exposed anterior teeth (2.00 ±1.72 mm) and CBCT reconstruction (2.12 ±1.94 mm). Significant differences in trueness and precision were found among the 3 groups of virtual dentofacial patients (P<.01). Significant differences among the deviations of all linear distances and the ideal error of 0.00 were observed for all groups of virtual dentofacial patients (P<.05). CONCLUSIONS The accuracy of registered-block impression was better than that of the exposed anterior teeth and CBCT reconstruction. The accuracy of exposed anterior teeth was lower than that of the other methods but could satisfy the requirements of clinical diagnostics and scientific methods. The accuracy of CBCT reconstruction was poor and could only be used for special situations that permitted low accuracy.
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Affiliation(s)
- Hongqiang Ye
- Associate Professor, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases &National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Beijing, PR China
| | - Jiahui Ye
- Graduate student, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases &National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Beijing, PR China
| | - Shimin Wang
- Dental Technician, Center of dental Laboratory, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Zixuan Wang
- Dental Technician, Center of dental Laboratory, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Jing Geng
- Graduate student, Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Yiqing Wang
- Graduate student, Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Yunsong Liu
- Professor, Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Yuchun Sun
- Professor, Center of Digital Dentistry, Peking University School and Hospital of Stomatology, Beijing, PR China
| | - Yongsheng Zhou
- Professor, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases &National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Beijing, PR China.
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2
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Biun J, Dudhia R, Arora H. The in-vitro accuracy of fiducial marker-based versus markerless registration of an intraoral scan with a cone-beam computed tomography scan in the presence of restoration artifact. Clin Oral Implants Res 2023; 34:1257-1266. [PMID: 37602506 DOI: 10.1111/clr.14166] [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: 05/24/2023] [Revised: 07/10/2023] [Accepted: 08/09/2023] [Indexed: 08/22/2023]
Abstract
OBJECTIVES To determine the effect of restoration artifact ('metal artifact') on registration accuracy of an intraoral scan and cone-beam computed tomography (CBCT) scan, comparing fiducial marker-based registration with markerless registration. MATERIALS AND METHODS A maxillary model was fitted with multiple configurations of zirconia crowns to simulate various states of oral rehabilitation. Intraoral scans and CBCT scans (half and full rotation) were acquired. Registration was performed using markerless (point-based registration with surface-based refinement) and fiducial marker-based registration. Each experimental condition was repeated 10 times (n = 320). The absolute deviation was measured at the canines and first molars, and the average and maximum values were analysed using multiple linear regression. RESULTS R2 was 0.874 for average error and 0.858 for maximum error. For markerless registration, there were 0.041 mm (p < .001) and 0.045 mm (p < .001) increases in average and maximum error per crown, respectively. For fiducial marker-based registration, the effect of additional crowns was not statistically significant for average (p = .067) or maximum (p = .438) error. For a full arch of crowns, the regression model predicted average and maximum errors of 0.581 and 0.697 mm for the markerless technique, and 0.185 and 0.210 mm for the fiducial marker-based technique. Overall, the fiducial marker-based technique was more accurate for four or more crowns. The half rotation scan increased average error by 0.021 mm (p = .001) and maximum error by 0.029 mm (p < .001). CONCLUSIONS Under the present study's experimental conditions, the fiducial marker-based technique should be considered if four or more full-coverage highly radiopaque restorations are present.
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Affiliation(s)
- John Biun
- School of Dentistry, The University of Queensland, Brisbane, Queensland, Australia
| | - Raahib Dudhia
- School of Dentistry, The University of Queensland, Brisbane, Queensland, Australia
| | - Himanshu Arora
- School of Dentistry, The University of Queensland, Brisbane, Queensland, Australia
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Lee JH, Lee HL, Park IY, On SW, Byun SH, Yang BE. Effectiveness of creating digital twins with different digital dentition models and cone-beam computed tomography. Sci Rep 2023; 13:10603. [PMID: 37391453 PMCID: PMC10313775 DOI: 10.1038/s41598-023-37774-x] [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: 09/09/2022] [Accepted: 06/27/2023] [Indexed: 07/02/2023] Open
Abstract
Distortion of dentition may occur in cone-beam computed tomography (CBCT) scans due to artifacts, and further imaging is frequently required to produce digital twins. The use of a plaster model is common; however, it has certain drawbacks. This study aimed to assess the feasibility of different digital dentition models over that of plaster casts. Plaster models, alginate impressions, intraoral scan (IOS) images, and CBCT images of 20 patients were obtained. The desktop model scanner was used to scan the alginate impression twice, five minutes and two hours after impression-making. Using an IOS, the full arch was scanned in segments using CS 3600 and simultaneously with i700 wireless. The digital twins obtained from the alginate impression and IOS were superimposed with those obtained from the plaster cast. The differences and distances at each reference point were measured. Scans of alginate impressions after two hours showed the greatest discrepancies, but these were all less than the CBCT voxel size of 0.39 mm. Alginate impression scans and IOS are suitable supplements to CBCT compared to the plaster model. Accuracy can be improved by scanning the alginate impression within five minutes or by intraoral scanning of the entire arch with segmentation.
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Affiliation(s)
- Joo-Hee Lee
- Division of Pediatric Dentistry, Hallym University Sacred Heart Hospital, Anyang, 14066, Korea
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
| | - Hye-Lim Lee
- Division of Pediatric Dentistry, Hallym University Sacred Heart Hospital, Anyang, 14066, Korea
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
| | - In-Young Park
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
| | - Sung-Woon On
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
| | - Soo-Hwan Byun
- Division of Oral and Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Anyang, 14066, Korea
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
- Institute of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea
| | - Byoung-Eun Yang
- Division of Oral and Maxillofacial Surgery, Hallym University Sacred Heart Hospital, Anyang, 14066, Korea.
- Department of Artificial Intelligence and Robotics in Dentistry, Graduate School of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea.
- Institute of Clinical Dentistry, Hallym University, Chuncheon, 24252, Korea.
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CBCT Images to an STL Model: Exploring the "Critical Factors" to Binarization Thresholds in STL Data Creation. Diagnostics (Basel) 2023; 13:diagnostics13050921. [PMID: 36900065 PMCID: PMC10000442 DOI: 10.3390/diagnostics13050921] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 02/24/2023] [Accepted: 02/28/2023] [Indexed: 03/05/2023] Open
Abstract
In-house fabrication of three-dimensional (3D) models for medical use has become easier in recent years. Cone beam computed tomography (CBCT) images are increasingly used as source data for fabricating osseous 3D models. The creation of a 3D CAD model begins with the segmentation of hard and soft tissues of the DICOM images and the creation of an STL model; however, it can be difficult to determine the binarization threshold in CBCT images. In this study, how the different CBCT scanning and imaging conditions of two different CBCT scanners affect the determination of the binarization threshold was evaluated. The key to efficient STL creation through voxel intensity distribution analysis was then explored. It was found that determination of the binarization threshold is easy for image datasets with a large number of voxels, sharp peak shapes, and narrow intensity distributions. Although the intensity distribution of voxels varied greatly among the image datasets, it was difficult to find correlations between different X-ray tube currents or image reconstruction filters that explained the differences. The objective observation of voxel intensity distribution may contribute to the determination of the binarization threshold for 3D model creation.
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Comparison of the dimensional and morphological accuracy of three-dimensional digital dental casts digitized using different methods. Odontology 2023; 111:165-171. [PMID: 36068382 DOI: 10.1007/s10266-022-00736-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 08/23/2022] [Indexed: 01/12/2023]
Abstract
The purpose of this study was to compare the accuracy of digital dental casts from plaster cast scanning (PCS), impression scanning (IPS), intraoral scanning (IOS), and cone-beam computed tomography (CBCT) scanning (CCS) methods. The maxillary and mandibular dental casts of 15 patients who needed CBCT scans for oral examination or treatment were digitized via four methods. 12 linear distance measurements of all digital dental casts were selected and acquired with software and compared to those of the reference plaster cast to evaluate the dimensional accuracy. Three-dimensional deviation analysis of the IPS, IOS and CCS groups with respect to the reference PCS group was performed to evaluate the morphological accuracy. The discrepancy in linear distances between the digital dental casts and reference plaster casts was statistically significant (p < 0.01). The dimensional accuracies of the PCS (0.06 ± 0.12 mm) and IPS (0.03 ± 0.05 mm) casts were better than those of the IOS (0.37 ± 0.30 mm) and CCS (0.54 ± 0.40 mm) casts. The one-sample t test showed that there were statistically significant differences between the discrepancies in 8 of the linear distances for the PCS group and 9 of the linear distances for the IPS group between the digital dental casts and reference plaster casts, with an ideal error of 0.00 (p < 0.05). The sequence of morphological accuracy from good to poor was maxillary and mandibular IPS, mandibular IOS; maxillary IOS; and maxillary and mandibular CCS. The accuracy of the digital dental casts from the PCS and IPS methods was greater than that of IOS and CCS methods. Although accuracy of the digital dental cast from IOS was low, it satisfied the clinical requirements for fixed restorations in small units. The accuracy of the digital dental cast from CCS was poorest and could only be used for procedures with lower accuracy requirements.
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Bianchi J, Mendonca G, Gillot M, Oh H, Park J, Turkestani NA, Gurgel M, Cevidanes L. Three-dimensional digital applications for implant space planning in orthodontics: A narrative review. J World Fed Orthod 2022; 11:207-215. [PMID: 36400658 DOI: 10.1016/j.ejwf.2022.10.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/20/2022] [Accepted: 10/20/2022] [Indexed: 11/17/2022]
Abstract
In the digital dentistry era, new tools, algorithms, data science approaches, and computer applications are available to researchers and clinicians. However, there is also a strong need for better knowledge and understanding of multisource data applications, including three-dimensional imaging information such as cone-beam computed tomography images and digital dental models for multidisciplinary cases. In addition, artificial intelligence models and automated clinical decision systems are rising. The clinician needs to plan the treatment based on state-of-the-art diagnosis for better and more personalized treatment. This article aimed to review basic concepts and the current panorama of digital implant planning in orthodontics, with open-source and closed-source tools for assessing cone-beam computed images and digital dental models. The visualization and processing of the three-dimensional data allow better implant planning based on bone conditions, adjacent teeth and root positions, and the prognosis of the case. We showed that many tools for assessment, segmentation, and visualization of cone-beam computed tomographic images and digital dental models could facilitate the treatment planning of patients needing implants or space closure. The tools and approaches presented are toward personalized treatment and better prognosis, following the path to a more automated clinical decision system based on multisource three-dimensional data, artificial intelligence models, and digital planning. In summary, the orthodontist needs to analyze each patient individually and use different software or tools that better fit their practice, allowing efficient treatment planning and satisfactory results with an adequate prognosis.
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Affiliation(s)
- Jonas Bianchi
- Department of Orthodontics, Arthur Dugoni School of Dentistry, University of the Pacific, San Francisco, California; Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, School of Dentistry University of the State of Sao Paulo, São Paulo State University (Unesp), São Paulo, Brazil.
| | - Gustavo Mendonca
- Department of Biologic and Materials Sciences & Prosthodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan
| | - Maxime Gillot
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Michigan
| | - Heesoo Oh
- Department of Orthodontics, Arthur Dugoni School of Dentistry, University of the Pacific, San Francisco, California
| | - Joorok Park
- Department of Orthodontics, Arthur Dugoni School of Dentistry, University of the Pacific, San Francisco, California
| | - Najla Al Turkestani
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Michigan; Department of Restorative and Aesthetic Dentistry, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Marcela Gurgel
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Michigan
| | - Lucia Cevidanes
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, Michigan
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Pieralli S, Beyer C, Wesemann C, Vach K, Russe MF, Kernen F, Nelson K, Spies BC. Impact of radiographic field-of-view volume on alignment accuracy during virtual implant planning: A noninterventional retrospective pilot study. Clin Oral Implants Res 2022; 33:1021-1029. [PMID: 35861131 DOI: 10.1111/clr.13983] [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: 12/08/2021] [Revised: 06/13/2022] [Accepted: 06/22/2022] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To evaluate the impact of reducing the radiographic field-of-view (FOV) on the trueness and precision of the alignment between cone beam computed tomography (CBCT) and intraoral scanning data for implant planning. MATERIALS AND METHODS Fifteen participants presenting with one of three clinical scenarios: single tooth loss (ST, n=5), multiple missing teeth (MT, n=5), and presence of radiographic artifacts (AR, n=5) were included. CBCT volumes covering the full arch (FA) were reduced to the quadrant (Q) or the adjacent tooth/teeth (A). Two operators, an expert (exp) in virtual implant planning and an inexperienced clinician, performed multiple superimpositions, with FA-exp serving as a reference. The deviations were calculated at the implant apex and shoulder levels. Thereafter, linear mixed models were adapted to investigate the influence of FOV on discrepancies. RESULTS Evaluation of trueness compared to FA-exp resulted in the largest mean (AR-A: 0.10 ± 0.33 mm) and single maximum discrepancy (AR-Q: 1.44 mm) in the presence of artifacts. Furthermore, for the ST group, the largest mean error (-0.06 ± 0.2 mm, shoulder) was calculated with the FA-FOV, while for MT, with the intermediate volume (-0.07 ± 0.24 mm, Q). In terms of precision, the mean SD intervals were ≤0.25 mm (A-exp). Precision was influenced by FOV volume (FA<Q<A) but not by operator expertise. CONCLUSIONS For single posterior missing teeth, an extended FOV does not improve registration accuracy. However, in the presence of artifacts or multiple missing posterior teeth, caution is recommended when reducing FOV.
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Affiliation(s)
- Stefano Pieralli
- Medical Center - University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine - University of Freiburg, Freiburg, Germany
| | - Christoph Beyer
- Medical Center - University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine - University of Freiburg, Freiburg, Germany.,Medical Center - University of Freiburg, Center of Dental Medicine, Department of Oral and Maxillofacial Surgery, Faculty of Medicine - University of Freiburg, Freiburg, Germany
| | - Christian Wesemann
- Medical Center - University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine - University of Freiburg, Freiburg, Germany
| | - Kirstin Vach
- Medical Center - University of Freiburg, Institute for Medical Biometry and Statistics, Faculty of Medicine - University of Freiburg, Freiburg, Germany
| | - Maximilian Frederik Russe
- Medical Center - University of Freiburg, Department of Diagnostic and Interventional Radiology, Faculty of Medicine - University of Freiburg, Freiburg, Germany
| | - Florian Kernen
- Medical Center - University of Freiburg, Center of Dental Medicine, Department of Oral and Maxillofacial Surgery, Faculty of Medicine - University of Freiburg, Freiburg, Germany
| | - Katja Nelson
- Medical Center - University of Freiburg, Center of Dental Medicine, Department of Oral and Maxillofacial Surgery, Faculty of Medicine - University of Freiburg, Freiburg, Germany
| | - Benedikt Christopher Spies
- Medical Center - University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine - University of Freiburg, Freiburg, Germany
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8
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Lahoud P, Jacobs R, Boisse P, EzEldeen M, Ducret M, Richert R. Precision medicine using patient-specific modelling: state of the art and perspectives in dental practice. Clin Oral Investig 2022; 26:5117-5128. [PMID: 35687196 DOI: 10.1007/s00784-022-04572-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 05/30/2022] [Indexed: 12/25/2022]
Abstract
The dental practice has largely evolved in the last 50 years following a better understanding of the biomechanical behaviour of teeth and its supporting structures, as well as developments in the fields of imaging and biomaterials. However, many patients still encounter treatment failures; this is related to the complex nature of evaluating the biomechanical aspects of each clinical situation due to the numerous patient-specific parameters, such as occlusion and root anatomy. In parallel, the advent of cone beam computed tomography enabled researchers in the field of odontology as well as clinicians to gather and model patient data with sufficient accuracy using image processing and finite element technologies. These developments gave rise to a new precision medicine concept that proposes to individually assess anatomical and biomechanical characteristics and adapt treatment options accordingly. While this approach is already applied in maxillofacial surgery, its implementation in dentistry is still restricted. However, recent advancements in artificial intelligence make it possible to automate several parts of the laborious modelling task, bringing such user-assisted decision-support tools closer to both clinicians and researchers. Therefore, the present narrative review aimed to present and discuss the current literature investigating patient-specific modelling in dentistry, its state-of-the-art applications, and research perspectives.
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Affiliation(s)
- Pierre Lahoud
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU, Leuven, Belgium.,Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Periodontology and Oral Microbiology, Department of Oral Health Sciences, KU Leuven, Leuven, Belgium
| | - Reinhilde Jacobs
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU, Leuven, Belgium.,Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institute, Stockholm, Sweden
| | - Philippe Boisse
- Laboratoire de Mécanique Des Contacts Et Structures, UMR 5259, CNRS/INSA, Villeurbanne, France
| | - Mostafa EzEldeen
- OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU, Leuven, Belgium.,Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Oral Health Sciences, KU Leuven and Paediatric Dentistry and Special Dental Care, University Hospitals Leuven, Leuven, Belgium
| | - Maxime Ducret
- Hospices Civils de Lyon, PAM d'Odontologie, Lyon, France.,Faculty of Odontology, Lyon 1 University, Lyon, France.,Laboratoire de Biologie Tissulaire Et Ingénierie Thérapeutique, UMR5305 CNRS/UCBL, Lyon, France
| | - Raphael Richert
- Laboratoire de Mécanique Des Contacts Et Structures, UMR 5259, CNRS/INSA, Villeurbanne, France. .,Hospices Civils de Lyon, PAM d'Odontologie, Lyon, France. .,Faculty of Odontology, Lyon 1 University, Lyon, France.
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Cabanes-Gumbau G, Agustín-Panadero R, Revilla-León M, Zubizarreta-Macho Á. Prosthetically-Driven Full-Mouth Implant-Supported Prostheses Using Guided Surgical Implant Planning with Composite Resin Markers: A Case Report. J Prosthodont 2021; 30:561-568. [PMID: 33864311 DOI: 10.1111/jopr.13367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/11/2021] [Indexed: 11/28/2022] Open
Abstract
This report describes a prosthetically-driven implant planning method, guided by the alignment procedures between the cone beam computed tomography, intraoral digital scans, and digitized maxillary and mandibular interim complete dentures using intraoral composite resin markers as a common reference. The markers were attached to the keratinized oral mucosa of the edentulous ridges using cyanoacrylate and kept in place during the digitizing procedures. The technique provides a simpler and more economical alternative to conventional prosthetically-driven static implant planning methods.
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Affiliation(s)
| | - Rubén Agustín-Panadero
- Prosthodontic and Occlusion Unit, Department of Stomatology, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain
| | - Marta Revilla-León
- AEGD Residency, Department of Comprehensive Dentistry, College of Dentistry, Texas A&M University, Dallas, Texas.,Department of Restorative Dentistry, School of Dentistry, University of Washington, Seattle, Wash; and Researcher, Revilla Research Center, Madrid, Spain
| | - Álvaro Zubizarreta-Macho
- Department of Implant Surgery, Faculty of Health Sciences, Alfonso X El Sabio University, Madrid, Spain
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Skjerven H, Olsen-Bergem H, Rønold HJ, Riis UH, Ellingsen JE. Comparison of postoperative intraoral scan versus cone beam computerised tomography to measure accuracy of guided implant placement-A prospective clinical study. Clin Oral Implants Res 2019; 30:531-541. [PMID: 31002415 DOI: 10.1111/clr.13438] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 03/27/2019] [Accepted: 03/28/2019] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To evaluate the accuracy of implant placement with a digitally planned guided implant procedure. Two methods for identifying the actual postoperative positioning of the implants were compared: CBCT and IO scanning. MATERIAL AND METHODS Twenty-eight implants with a sandblasted and acid-etched surface were placed in thirteen patients using tooth-supported surgical guides following a digital planning procedure. The implants were submerged for 12-15 weeks. New CBCT images were taken for identification of the implant position. After second stage surgery, scan bodies were mounted on the implants and scanned with an IO digital scanner. The recordings from the CBCT images and the IO scans were compared with respect to the identified positions of the implants. RESULTS The study did not resolve any significant differences of the identified positioning of the implants as measured by CBCT or IO, except for the apical deviations at the coronal and apical points. The angular difference between CBCT and IO scanning at the coronal point was -0.011 (±0.6) degrees, whereas the 3D deviation was 0.03(±0.17) mm. The distal deviation between CBCT and IO scanning was 0.01(± 0.16) mm, and the vestibular deviation 0.033(± 0.16) mm and the apical deviation difference was 0.09(± 0.16) mm. The 3D deviation at the apical point was 0.04(± 0.22) mm. The distal deviation between CBCT and IO scanning was 0.06(± 0.19) mm, and the vestibular deviation 0.032(± 0.23) mm and the apical deviation difference was 0.09(± 0. 16) mm. CONCLUSION The study demonstrated that accuracy measurements using IO scanning yields comparable results to those obtained by CBCT.
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Affiliation(s)
- Henrik Skjerven
- Department of Prosthodontics, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
| | - Heming Olsen-Bergem
- Department of Oral Surgery and Oral Medicine, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
| | - Hans Jacob Rønold
- Department of Prosthodontics, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
| | - Ulf H Riis
- Oral and Maxillofacial Radiology, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
| | - Jan Eirik Ellingsen
- Department of Prosthodontics, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway
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11
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Faber J, Miranda L, Faber C, Valim P, Bicalho LS, Milki-Neto J. Surgery-first orthognathic surgery with computer assisted three-dimensional planning. Semin Orthod 2018. [DOI: 10.1053/j.sodo.2018.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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12
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Kim JE, Park JH, Kim JH, Shim JS. Computer-based implant planning involving a prefabricated custom tray with alumina landmark structures. J Prosthet Dent 2018; 121:373-377. [PMID: 30409722 DOI: 10.1016/j.prosdent.2018.06.002] [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: 04/03/2018] [Revised: 05/31/2018] [Accepted: 06/01/2018] [Indexed: 11/17/2022]
Abstract
The purpose of this technical report was to describe a method for the fabrication of a custom tray with landmark structures to coordinate cone beam computed tomography and scan data for use in guided implant surgery in patients with numerous artifact-causing metal prostheses. The fabricated custom tray can be used to coordinate cone beam computed tomography data and scan data from the dentition, as well as to fabricate the prostheses.
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Affiliation(s)
- Jong-Eun Kim
- Clinical Assistant Professor, Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Ji-Hyun Park
- Graduate student, Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - Jee-Hwan Kim
- Associate Professor, Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea
| | - June-Sung Shim
- Professor, Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
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13
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14
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Jacobs R, Salmon B, Codari M, Hassan B, Bornstein MM. Cone beam computed tomography in implant dentistry: recommendations for clinical use. BMC Oral Health 2018; 18:88. [PMID: 29764458 PMCID: PMC5952365 DOI: 10.1186/s12903-018-0523-5] [Citation(s) in RCA: 201] [Impact Index Per Article: 33.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 03/26/2018] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND In implant dentistry, three-dimensional (3D) imaging can be realised by dental cone beam computed tomography (CBCT), offering volumetric data on jaw bones and teeth with relatively low radiation doses and costs. The latter may explain why the market has been steadily growing since the first dental CBCT system appeared two decades ago. More than 85 different CBCT devices are currently available and this exponential growth has created a gap between scientific evidence and existing CBCT machines. Indeed, research for one CBCT machine cannot be automatically applied to other systems. METHODS Supported by a narrative review, recommendations for justified and optimized CBCT imaging in oral implant dentistry are provided. RESULTS The huge range in dose and diagnostic image quality requires further optimization and justification prior to clinical use. Yet, indications in implant dentistry may go beyond diagnostics. In fact, the inherent 3D datasets may further allow surgical planning and transfer to surgery via 3D printing or navigation. Nonetheless, effective radiation doses of distinct dental CBCT machines and protocols may largely vary with equivalent doses ranging between 2 to 200 panoramic radiographs, even for similar indications. Likewise, such variation is also noticed for diagnostic image quality, which reveals a massive variability amongst CBCT technologies and exposure protocols. For anatomical model making, the so-called segmentation accuracy may reach up to 200 μm, but considering wide variations in machine performance, larger inaccuracies may apply. This also holds true for linear measures, with accuracies of 200 μm being feasible, while sometimes fivefold inaccuracy levels may be reached. Diagnostic image quality may also be dramatically hampered by patient factors, such as motion and metal artefacts. Apart from radiodiagnostic possibilities, CBCT may offer a huge therapeutic potential, related to surgical guides and further prosthetic rehabilitation. Those additional opportunities may surely clarify part of the success of using CBCT for presurgical implant planning and its transfer to surgery and prosthetic solutions. CONCLUSIONS Hence, dental CBCT could be justified for presurgical diagnosis, preoperative planning and peroperative transfer for oral implant rehabilitation, whilst striving for optimisation of CBCT based machine-dependent, patient-specific and indication-oriented variables.
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Affiliation(s)
- Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium. .,Department of Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium. .,Department of Dental Medicine (DENTMED), Karolinska Institutet, Stockholm, Sweden.
| | - Benjamin Salmon
- EA2496, Orofacial Pathologies, Imaging and Biotherapies Lab, Dental School Paris Descartes University, Sorbonne Paris Cité, Paris, France.,Department of Odontology, AP-HP, Nord Val de Seine Hospital (Bretonneau), Paris, France
| | - Marina Codari
- Unit of Radiology, IRCCS Policlinico San Donato, San Donato Milanese, Italy
| | - Bassam Hassan
- Department of Oral Function and Restorative Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), Research Institute MOVE, 1081 LA, Amsterdam, The Netherlands
| | - Michael M Bornstein
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, Kapucijnenvoer 33, 3000, Leuven, Belgium.,Applied Oral Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China
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15
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Replacement of the Distorted Dentition of the Cone-Beam Computed Tomography Scans for Orthognathic Surgery Planning. J Oral Maxillofac Surg 2018; 76:1561.e1-1561.e8. [PMID: 29572134 DOI: 10.1016/j.joms.2018.02.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 02/13/2018] [Accepted: 02/16/2018] [Indexed: 10/17/2022]
Abstract
PURPOSE Cone-beam computed tomography (CBCT) does not record dental morphology accurately because of the scattering produced by metallic restorations and the reported magnification of the dentition. The aim of this study was the development and evaluation of a new method for the replacement of the distorted dentition of CBCT scans with a 3-dimensional (3D) dental image captured by a digital intraoral camera. MATERIALS AND METHODS Six dried skulls with orthodontic brackets fixed on the teeth were used in this study. Three intraoral markers made of dental stone were constructed and attached to orthodontic brackets. The skulls were scanned by CBCT and the occlusal surfaces were captured using the TRIOS 3D intraoral scanner. The digital intraoral scan (IOS) was fused into the CBCT models. This produced a new composite digital model of the skull and the dentition. The skulls were scanned again using the commercially accurate Faro laser arm to produce the 3D model the skull and teeth gold standard for the assessment of the accuracy of the developed method. This was assessed by measuring the distance between the occlusal surfaces of the new composite model and the gold standard 3D laser produced model. RESULTS The results showed the errors related to the superimposition of the intraoral image on the CBCT to replace the distorted dentition were 0.11 to 0.20 mm. CONCLUSION The results of this novel method suggest that the dentition on the CBCT scan can be accurately replaced with the digital IOS image captured by an intraoral scanner to create a composite model that will improve the accuracy of digital orthognathic surgical planning and the fabrication of the guiding occlusal wafer.
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DE Vico G, Ferraris F, Arcuri L, Guzzo F, Spinelli D. A novel workflow for computer guided implant surgery matching digital dental casts and CBCT scan. ORAL & IMPLANTOLOGY 2016; 9:33-48. [PMID: 28042429 DOI: 10.11138/orl/2016.9.1.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Nowadays computer-guided "flap-less" surgery for implant placement using stereolithographic tem-plates is gaining popularity among clinicians and patients. The advantages of this surgical protocol are its minimally invasive nature, accuracy of implant placement, predictability, less post-surgical discomfort and reduced time required for definitive rehabilitation. Aim of this work is to describe a new protocol (Smart Fusion by Nobel Biocare), thanks to which is now possible to do a mini-invasive static guided implant surgery, in partially edentulous patients with at least 6 remaining teeth, without the use of a radiographic guide. This is possible thanks to a procedure named surface mapping based on the matching between numerous points on the surface of patient's dental casts and the corresponding anatomical surface points in the CBCT data. The full protocol is examined focusing the attention on the clinical and laboratory procedures. CONCLUSIONS Also with some critical points and needing an adequate learning curve, this protocol allows to select the ideal implant position in depth, inclination and mesio-distal distance between natural teeth and or other implants enabling a very safe and predictable rehabilitation compared with conventional surgery. It represents a good tool for the best compromise between anatomy, function and aesthetic, able to guarantee better results in all clinical situations.
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Affiliation(s)
| | | | - L Arcuri
- DDS Private Practice, Rome, Italy
| | - F Guzzo
- DDS Private Practice, Rome, Italy
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Ajioka H, Kihara H, Odaira C, Kobayashi T, Kondo H. Examination of the Position Accuracy of Implant Abutments Reproduced by Intra-Oral Optical Impression. PLoS One 2016; 11:e0164048. [PMID: 27706225 PMCID: PMC5052018 DOI: 10.1371/journal.pone.0164048] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Accepted: 09/19/2016] [Indexed: 11/23/2022] Open
Abstract
An impression technique called optical impression using intraoral scanner has attracted attention in digital dentistry. This study aimed to evaluate the accuracy of the optical impression, comparing a virtual model reproduced by an intraoral scanner to a working cast made by conventional silicone impression technique. Two implants were placed on a master model. Working casts made of plaster were fabricated from the master model by silicone impression. The distance between the ball abutments and the angulation between the healing abutments of 5 mm and 7 mm height at master model were measured using Computer Numerical Control Coordinate Measuring Machine (CNCCMM) as control. Working casts were then measured using CNCCMM, and virtual models via stereo lithography data of master model were measured by a three-dimensional analyzing software. The distance between ball abutments of the master model was 9634.9 ± 1.2 μm. The mean values of trueness of the Lava COS and working casts were 64.5 μm and 22.5 μm, respectively, greater than that of control. The mean of precision values of the Lava COS and working casts were 15.6 μm and 13.5 μm, respectively. In the case of a 5-mm-height healing abutment, mean angulation error of the Lava COS was greater than that of the working cast, resulting in significant differences in trueness and precision. However, in the case of a 7-mm-height abutment, mean angulation errors of the Lava COS and the working cast were not significantly different in trueness and precision. Therefore, distance errors of the optical impression were slightly greater than those of conventional impression. Moreover, the trueness and precision of angulation error could be improved in the optical impression using longer healing abutments. In the near future, the development of information technology could enable improvement in the accuracy of the optical impression with intraoral scanners.
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Affiliation(s)
- Hitoshi Ajioka
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Iwate, Japan
| | - Hidemichi Kihara
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Iwate, Japan
| | - Chikayuki Odaira
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Iwate, Japan
| | - Takuya Kobayashi
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Iwate, Japan
| | - Hisatomo Kondo
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Iwate, Japan
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18
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Virtual setup: application in orthodontic practice. J Orofac Orthop 2016; 77:409-419. [PMID: 27595882 DOI: 10.1007/s00056-016-0048-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 03/21/2016] [Indexed: 11/27/2022]
Abstract
BACKGROUND A plaster dental model is a patient's traditional three-dimensional (3D) record. If the dental crowns from a plaster model are separated and positioned in wax, this setup of the crowns can be used to simulate orthodontic treatment. The traditional way to make this dental setup requires significant time by the orthodontist and in the orthodontic lab. New developments in dentistry and orthodontics include the possibility of virtual setups. AIM In this article, the differences between conventional setups with plaster models and virtual setups are discussed. METHODS A clinical patient is described for whom two different setups were made and compared by model superimposition with Geomagic Qualify software. RESULTS According to the literature and the results from this study, virtual setups and conventional setups with plaster models are equally accurate. CONCLUSION Virtual setups present several advantages, e.g., digital storage, digital models cannot be damaged, the same model can undergo several treatment simulations, and communication between dental and surgical professionals and between dental professionals and patients is facilitated. Despite these advantages, considerable time and training are needed for dental professionals to master and adopt the general use of digital models and virtual setups in dentistry.
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Flügge T, Derksen W, Te Poel J, Hassan B, Nelson K, Wismeijer D. Registration of cone beam computed tomography data and intraoral surface scans - A prerequisite for guided implant surgery with CAD/CAM drilling guides. Clin Oral Implants Res 2016; 28:1113-1118. [PMID: 27440381 PMCID: PMC5599947 DOI: 10.1111/clr.12925] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/18/2016] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Guided implant surgery (GIS) is performed with drilling guides that are produced on the virtual tooth model using CAD/CAM technology. The prerequisite for this workflow is the alignment of patients cone beam computed tomography CBCT and surface scan (registration). Dental restorations may cause deteriorating imaging artifacts in CBCT data, which in turn can have an impact on the registration process. The influence of the user and the preprocessing of data and of image artifacts on the registration accuracy were examined. MATERIAL AND METHODS CBCT data and intraoral surface scans of 36 patients were used for virtual implant planning in coDiagnostiX (Dentalwings, Montreal, Canada). CBCT data were reconstructed to a three-dimensional anatomical model with the default settings provided by the software and also manually by four different examiners. Subsequently, the CBCT and intraoral surface models were registered by each examiner with the help of anatomical landmarks. Patients' data were subdivided into four groups (A-D) according to the number of metallic restorations: A = 0-2 restorations, B = 3-5 restorations, C = 6-8 restorations and D > 8 restorations. After registration, the distances between CBCT and dental surface models were measured. Linear regression models were used to assess the influence of the segmentation, the examiner and to the number of restorations (P < 0.05). RESULTS The deviations between surface scan and CBCT models accounted to 0.54 mm (mean). The mean deviations were 0.69 mm (max. 24.8 mm) and 0.4 mm (max. 9.1 mm) for default and manual segmentation, respectively. Mean deviations of 0.36 mm (Group A), 0.43 mm (Group B), 0.67 mm (Group C) and 1.01 mm (Group D) were recorded. The segmentation (P = 0.000), the user (P = 0.0052) and the number of restorations (P = 0.0337) had a significant influence on the registration accuracy. CONCLUSIONS The deviation between CBCT and surface scan model resulting from inaccurate registration is transferred to the surgical field and results in a deviation between the planned and actual implant position. The registration accuracy in commercial virtual implant planning software is significantly influenced by the preprocessing of imported data, by the user and by the number of restorations resulting in clinically non-acceptable deviations encoded in drilling guides.
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Affiliation(s)
- Tabea Flügge
- Department of Oral Implantology, Academisch Centrum Tandheelkunde Amsterdam (ACTA), Amsterdam, Netherlands.,Department of Oral and Maxillofacial Surgery, Faculty of Medicine and Medical Center - University of Freiburg, Freiburg, Germany
| | - Wiebe Derksen
- Department of Oral Implantology, Academisch Centrum Tandheelkunde Amsterdam (ACTA), Amsterdam, Netherlands
| | - Jobine Te Poel
- Department of Oral Implantology, Academisch Centrum Tandheelkunde Amsterdam (ACTA), Amsterdam, Netherlands
| | - Bassam Hassan
- Department of Oral Implantology, Academisch Centrum Tandheelkunde Amsterdam (ACTA), Amsterdam, Netherlands
| | - Katja Nelson
- Department of Oral and Maxillofacial Surgery, Faculty of Medicine and Medical Center - University of Freiburg, Freiburg, Germany
| | - Daniel Wismeijer
- Department of Oral Implantology, Academisch Centrum Tandheelkunde Amsterdam (ACTA), Amsterdam, Netherlands
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Ribeiro J, Marin C, Homsi N, Rocha Junior H, Magacho L, Fidalgo G, Zanela M. Tomographic Evaluation of Mandibular Thickness on Premolar and Molar Regions Related to Monocortical Screws. Craniomaxillofac Trauma Reconstr 2016; 9:105-8. [PMID: 27162564 DOI: 10.1055/s-0035-1566162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 06/19/2015] [Indexed: 10/22/2022] Open
Abstract
The aim of this study was to measure the thickness of the mandible from the external cortical plate to the teeth roots on premolar and molar regions using CT scan to determine the safety margin for the application of monocortical screws for internal rigid fixation. Thirty-one patients underwent CT-scan imaging for surgical planning. The images were used to measure bilaterally the distance from the external cortex of the mandible to the roots of teeth on premolar and molar region by means of Dental Slice software (Bioparts Prototipagem Biomedica, Brasília, DF, Brazil). Mean, median, standard deviation, one-way ANOVA and post hoc Tukey's test were used for statistical analysis. No statistical differences for thickness were found between right and left side (p = 0.1652). The mean thickness for the left side was 4.17 ± 1.68 mm and for right side 3.93 ± 1.49 mm. Increase in mandibular thickness from anterior to posterior regions in both sides was observed and statistical difference was found among the different groups according to the measured region (p < 0.05). The present results can predict the safety zone for the use of monocortical screws in the mandible, but the use of CT scan is imperative and individual analysis is desired owing to anatomical variations. Further studies with larger samples are necessary to confirm these data and should include other anatomic structures, different regions of mandible/maxilla, as well as other ethnic groups.
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Affiliation(s)
- Jonathan Ribeiro
- Department of Oral and Maxillofacial Surgery, São José College, Rio de Janeiro, Brazil
| | - Charles Marin
- Department of Implantology, Unigranrio University, Rio de Janeiro, Brazil
| | - Nicolas Homsi
- Department of Maxillofacial Surgery, Fluminense Federal University, Rio de Janeiro, Brazil
| | - Hernando Rocha Junior
- Department of Maxillofacial Surgery, Nova Iguaçu General Hospital, Nova Iguaçu, Brazil
| | - Luiz Magacho
- Department of Maxillofacial Surgery, Nova Iguaçu General Hospital, Nova Iguaçu, Brazil
| | - Guto Fidalgo
- Department of Maxillofacial Surgery, Nova Iguaçu General Hospital, Nova Iguaçu, Brazil
| | - Manuella Zanela
- Department of Maxillofacial Surgery, Nova Iguaçu General Hospital, Nova Iguaçu, Brazil
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Dimensional accuracy of digital dental models from cone-beam computed tomography scans of alginate impressions according to time elapsed after the impressions. Am J Orthod Dentofacial Orthop 2016; 149:287-94. [PMID: 26827986 DOI: 10.1016/j.ajodo.2015.08.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 08/01/2015] [Accepted: 08/01/2015] [Indexed: 11/23/2022]
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Hayashi K, Chung O, Park S, Lee SP, Sachdeva RC, Mizoguchi I. Influence of standardization on the precision (reproducibility) of dental cast analysis with virtual 3-dimensional models. Am J Orthod Dentofacial Orthop 2015; 147:373-80. [DOI: 10.1016/j.ajodo.2014.11.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Revised: 11/01/2014] [Accepted: 11/01/2014] [Indexed: 11/26/2022]
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Kang SH, Lee JW, Lim SH, Kim YH, Kim MK. Dental image replacement on cone beam computed tomography with three-dimensional optical scanning of a dental cast, occlusal bite, or bite tray impression. Int J Oral Maxillofac Surg 2014; 43:1293-301. [PMID: 25015906 DOI: 10.1016/j.ijom.2014.06.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 04/29/2014] [Accepted: 06/17/2014] [Indexed: 11/28/2022]
Abstract
The goal of the present study was to compare the accuracy of dental image replacement on a cone beam computed tomography (CBCT) image using digital image data from three-dimensional (3D) optical scanning of a dental cast, occlusal bite, and bite tray impression. A Bracket Typodont dental model was used. CBCT of the dental model was performed and the data were converted to stereolithography (STL) format. Three experimental materials, a dental cast, occlusal bite, and bite tray impression, were optically scanned in 3D. STL files converted from the CBCT of the Typodont model and the 3D optical-scanned STL files of the study materials were image-registered. The error range of each methodology was measured and compared with a 3D optical scan of the Typodont. For the three materials, the smallest error observed was 0.099±0.114mm (mean error±standard deviation) for registering the 3D optical scan image of the dental cast onto the CBCT dental image. Although producing a dental cast can be laborious, the study results indicate that it is the preferred method. In addition, an occlusal bite is recommended when bite impression materials are used.
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Affiliation(s)
- S-H Kang
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
| | - J-W Lee
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea
| | - S-H Lim
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea
| | - Y-H Kim
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea
| | - M-K Kim
- Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Republic of Korea
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