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Kang YJ, Oh KC, Kim GY, Moon HS. Comparative evaluation of digitally fabricated complete dentures versus conventional complete dentures: A randomized, single-blinded, cross-over clinical trial. J Prosthet Dent 2024; 132:408-418. [PMID: 36096912 DOI: 10.1016/j.prosdent.2022.05.013] [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: 12/17/2021] [Revised: 05/04/2022] [Accepted: 05/04/2022] [Indexed: 10/14/2022]
Abstract
STATEMENT OF PROBLEM Clinical trials comparing outcomes associated with digital complete dentures (CDs) fabricated from intraoral scan data with those of CDs fabricated by using the conventional workflow are lacking. PURPOSE The purpose of this randomized clinical trial was to evaluate the clinical performance of and patient satisfaction associated with digitally versus conventionally fabricated CDs. MATERIAL AND METHODS Eight participants requiring CDs were enrolled in this study. Two sets of CDs were fabricated for each participant. One set was fabricated by using a digital workflow, which involved digital scanning with an intraoral scanner, whereas the other set was made by using the conventional workflow. The participants were given 1 set of CDs for 1 month and another set for the next month. The order of placing CDs was randomly selected for each participant. The internal adaptation, masticatory force, and masticatory efficiency of the CDs in each group were evaluated for objective analysis. Additionally, a questionnaire was provided to the participants, and the responses were evaluated for subjective satisfaction analysis. All parameters were analyzed by using t tests (α=.05). RESULTS The internal adaptation did not statistically significantly differ between the conventional and digital CDs with regard to the maxillary arches (P=.406) and mandibular arches (P=.412). The average masticatory force (P=.051) and maximum masticatory force (P=.110) likewise did not statistically significantly differ between the 2 types of CDs. Masticatory efficiency, expressed via the mixing ability index, was statistically better for conventional CDs than the digital CDs (P=.009). No statistically significant differences were observed between the 2 types of CDs in terms of overall patient satisfaction as assessed by using the study questionnaire (P=.172 for maxillary CD and P=.161 for mandibular CD). However, the conventional CDs were statistically significantly better than the digital CDs with regard to subjective satisfaction with pronunciation ability (P=.006). CONCLUSIONS The digital CDs were inferior to the conventional CDs in terms of masticatory efficiency and pronunciation. However, internal adaptation and overall patient satisfaction were comparable between conventional and digital CDs. This finding suggests that intraoral scanning and additively manufactured CDs may be suitable for edentulous patients, at least for interim use.
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Affiliation(s)
- You-Jung Kang
- Postdoctoral Researcher, Department of Prosthodontics, Oral Science Research Center, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Kyung Chul Oh
- Associate Professor, Department of Prosthodontics, Yonsei University College of Dentistry, Seoul, Republic of Korea.
| | - Gi Youn Kim
- Graduate student, Department and Research Institute of Dental Biomaterials and Bioengineering, BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, Republic of Korea
| | - Hong Seok Moon
- Professor, Department of Prosthodontics, Yonsei University College of Dentistry, Seoul, Republic of Korea
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2
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Limones A, Celemín-Viñuela A, Romeo-Rubio M, Castillo-Oyagüe R, Gómez-Polo M, Martínez Vázquez de Parga JA. Outcome measurements and quality of randomized controlled clinical trials of tooth-supported fixed dental prostheses: A systematic review and qualitative analysis. J Prosthet Dent 2024; 132:326-336. [PMID: 36109260 DOI: 10.1016/j.prosdent.2022.04.022] [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: 07/26/2021] [Revised: 04/25/2022] [Accepted: 04/26/2022] [Indexed: 11/16/2022]
Abstract
STATEMENT OF PROBLEM The lack of consensus regarding a standardized set of outcome measurements and noncompliance with current reporting guidelines in clinical trials of tooth-supported fixed dental prostheses (FDPs) hamper interstudy comparability, compromise scientific evidence, and waste research effort and resources in prosthetic dentistry. PURPOSE The primary objective of this systematic review was to identify all primary and secondary outcome measurements assessed in randomized controlled trials (RCTs) of tooth-supported FDPs. Secondary objectives were to assess their methodological quality by using the Cochrane Collaboration's risk of bias tool (RoB, v2.0) and their reporting quality by means of a standardized 16-item CONSORT assessment tool through published reports. MATERIAL AND METHODS An electronic search was conducted in MEDLINE, EMBASE, and Cochrane library to identify all RCT-related articles published in the past 10 years. Differences in RoB were tested with the Pearson chi-squared test, and those in CONSORT score with the Student t test. RESULTS A total of 64 RCTs from 79 publications were deemed eligible. The diversity of outcome measures used in the field is apparent. Twenty percent of the included studies had a low RoB, 79% showed some concerns, and 1% had a high RoB. The mean ±standard deviation CONSORT compliance score was 22.56 ±3.17. Trials adhered to the CONSORT statement reported lower RoB than those that did not adhere (P<.001). RCTs with a low RoB reported more comprehensive adherence to CONSORT guidelines than those with some concerns (MD 4 [95% CI 1.52-6.48]; P=.004). CONCLUSIONS A standardized core outcome reporting set in clinical research on tooth-supported FDPs remains evident. Adherence to the CONSORT statement continues to be low, with some RoB concerns that can be improved.
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Affiliation(s)
- Alvaro Limones
- Student, Assistant Professor, Department of Conservative & Prosthetic Dentistry, Faculty of Dentistry, Complutense University of Madrid (UCM), Madrid, Spain.
| | - Alicia Celemín-Viñuela
- Professor, Department of Conservative & Prosthetic Dentistry, Faculty of Dentistry, Complutense University of Madrid (UCM), Madrid, Spain
| | - Marta Romeo-Rubio
- Professor, Department of Conservative & Prosthetic Dentistry, Faculty of Dentistry, Complutense University of Madrid (UCM), Madrid, Spain
| | - Raquel Castillo-Oyagüe
- Cathedratic Professor, Department of Conservative & Prosthetic Dentistry, Faculty of Dentistry, Complutense University of Madrid (UCM), Madrid, Spain
| | - Miguel Gómez-Polo
- Professor, Department of Conservative & Prosthetic Dentistry, Faculty of Dentistry, Complutense University of Madrid (UCM), Madrid, Spain
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Mahato M, Hota S, Jain A, Dutta D, Bhushan P, Raut A. Comparison of Conventional and Digital Workflows in the Fabrication of Fixed Prostheses: A Systematic Review. Cureus 2024; 16:e61764. [PMID: 38975453 PMCID: PMC11226733 DOI: 10.7759/cureus.61764] [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: 06/04/2024] [Indexed: 07/09/2024] Open
Abstract
When considering dental restorations, the use of fixed partial dentures is one of the most widely accepted treatment options. In the past, fabrication was done using traditional techniques and the conventional workflow was by far the popular method; however, nowadays digital workflows are being used as a means to produce the prosthesis. This systematic review aims to compare the workflows by considering their respective qualities, such as precision, efficiency, cost-effectiveness, and clinical performance. A complete search has been carried out to incorporate any relevant studies published between the years 2012 and 2023 in databases such as Scopus, Web of Science, PubMed, ScienceDirect, and Cochrane Library. Two independent reviewers screened articles for inclusion and assessed the studies' methodological quality rating via the NIH Tool. A total of 22 relevant articles were reviewed after a systematic search strategy. The main outcome of the review was digital workflows were found to reduce working time, eliminate the selection of trays, minimize material consumption, and enhance patient comfort and acceptance. The studies also showed that digital workflows resulted in greater patient satisfaction and higher success rates than conventional workflows. Workflows for digital dentistry demonstrated to be better than traditional ones due to the cost-effectiveness, accuracy, and time optimization for the fabrication of fixed prostheses.
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Affiliation(s)
- Mousumi Mahato
- Prosthodontics, Kalinga Institute of Medical Sciences, Kalinga Institute of Industrial Technology (KIIT) DU, Bhubaneswar, IND
| | - Sadananda Hota
- Prosthodontics, Kalinga Institute of Dental Sciences, Kalinga Institute of Industrial Technology (KIIT) DU, Bhubaneswar, IND
| | - Amulya Jain
- Prosthodontics and Crown and Bridge, Kalinga Institute of Dental Sciences, Kalinga Institute of Industrial Technology (KIIT) DU, Bhubaneswar, IND
| | - Debanwita Dutta
- Prosthodontics, Kalinga Institute of Medical Sciences, Kalinga Institute of Industrial Technology (KIIT) DU, Bhubaneswar, IND
| | - Purnendu Bhushan
- Prosthodontics, Kalinga Institute of Dental Sciences, Kalinga Institute of Industrial Technology (KIIT) DU, Bhubaneswar, IND
| | - Anjana Raut
- Prosthodontics, Kalinga Institute of Dental Sciences, Kalinga Institute of Industrial Technology (KIIT) DU, Bhubaneswar, IND
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Sourvanos D, Sun H, Zhu TC, Dimofte A, Byrd B, Busch TM, Cengel KA, Neiva R, Fiorellini JP. Three-dimensional printing of the human lung pleural cavity model for PDT malignant mesothelioma. Photodiagnosis Photodyn Ther 2024; 46:104014. [PMID: 38346466 DOI: 10.1016/j.pdpdt.2024.104014] [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: 10/31/2023] [Revised: 02/06/2024] [Accepted: 02/09/2024] [Indexed: 03/18/2024]
Abstract
OBJECTIVE The primary aim was to investigate emerging 3D printing and optical acquisition technologies to refine and enhance photodynamic therapy (PDT) dosimetry in the management of malignant pleural mesothelioma (MPM). MATERIALS AND METHODS A rigorous digital reconstruction of the pleural lung cavity was conducted utilizing 3D printing and optical scanning methodologies. These reconstructions were systematically assessed against CT-derived data to ascertain their accuracy in representing critical anatomic features and post-resection topographical variations. RESULTS The resulting reconstructions excelled in their anatomical precision, proving instrumental translation for precise dosimetry calculations for PDT. Validation against CT data confirmed the utility of these models not only for enhancing therapeutic planning but also as critical tools for educational and calibration purposes. CONCLUSION The research outlined a successful protocol for the precise calculation of light distribution within the complex environment of the pleural cavity, marking a substantive advance in the application of PDT for MPM. This work holds significant promise for individualizing patient care, minimizing collateral radiation exposure, and improving the overall efficiency of MPM treatments.
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Affiliation(s)
- Dennis Sourvanos
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, PA, USA; Center for Innovation and Precision Dentistry (CiPD), School of Dental Medicine, School of Engineering, University of Pennsylvania, PA, USA.
| | - Hongjing Sun
- Department of Radiation Oncology, Perelman Center for Advanced Medicine, University of Pennsylvania, PA, USA
| | - Timothy C Zhu
- Department of Radiation Oncology, Perelman Center for Advanced Medicine, University of Pennsylvania, PA, USA
| | - Andreea Dimofte
- Department of Radiation Oncology, Perelman Center for Advanced Medicine, University of Pennsylvania, PA, USA
| | - Brook Byrd
- Department of Radiation Oncology, Perelman Center for Advanced Medicine, University of Pennsylvania, PA, USA
| | - Theresa M Busch
- Department of Radiation Oncology, Perelman Center for Advanced Medicine, University of Pennsylvania, PA, USA
| | - Keith A Cengel
- Department of Radiation Oncology, Perelman Center for Advanced Medicine, University of Pennsylvania, PA, USA
| | - Rodrigo Neiva
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, PA, USA
| | - Joseph P Fiorellini
- Department of Periodontics, School of Dental Medicine, University of Pennsylvania, PA, USA
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de Souza FA, Blois MC, Collares K, Dos Santos MBF. 3D-printed and conventional provisional single crown fabrication on anterior implants: A randomized clinical trial. Dent Mater 2024; 40:340-347. [PMID: 38103959 DOI: 10.1016/j.dental.2023.12.004] [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: 05/24/2023] [Revised: 11/28/2023] [Accepted: 12/08/2023] [Indexed: 12/19/2023]
Abstract
OBJECTIVES The present study aims to compare provisional single crowns on anterior implants made using conventional PMMA and 3D-printed workflows. The study assessed the occurrence of failures, color variation, signs of early deterioration, operating time, and patients' satisfaction with the treatment through a randomized controlled trial. METHODS This study was conducted as a randomized controlled trial, following the SPIRIT and CONSORT guidelines. Patients were included in the study after meeting the eligibility criteria and were randomly assigned to one of two groups (conventional and 3D-printed). FDI criteria, visible plaque index (VPI), bleeding on probing (BOP), and color variation were considered as the primary outcomes. Operating time and patient satisfaction were also assessed as secondary outcomes. Fisher's exact test was performed to analyze the association between the primary and secondary outcomes and the study groups. Mann-Whitney test was used to compare the mean VAS satisfaction scores between the conventional PMMA and 3D-printed groups (STATA 14™, with an α = 0.05). RESULTS A total of 42 provisional single crowns (n = 21) were made for 33 patients. Only the fracture parameter (FDI) showed a statistically significant difference, with 3D-printed provisionals exhibiting higher rates of catastrophic failures compared to conventional ones (p = 0.05). Although the operating time for the 3D-printed group was shorter (p < 0.001), no statistical difference observed in patients' satisfaction regarding esthetics, phonetics, chewing, or comfort. SIGNIFICANCE 3D-printed and conventional PMMA provisional single crowns showed comparable clinical performance, except for the observed fracture types. Although 3D-printed provisional restorations showed a shorter operating time, overall patients' satisfaction was not affected.
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Affiliation(s)
- Fernanda Angeloni de Souza
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil; Program in Dentistry, Mercosur Dental Educational Institute, Brazil
| | - Matheus Coelho Blois
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil; Program in Dentistry, Mercosur Dental Educational Institute, Brazil
| | - Kaue Collares
- Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil
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Bessadet M, Drancourt N, El Osta N. Time efficiency and cost analysis between digital and conventional workflows for the fabrication of fixed dental prostheses: A systematic review. J Prosthet Dent 2024:S0022-3913(24)00003-9. [PMID: 38302291 DOI: 10.1016/j.prosdent.2024.01.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 01/02/2024] [Accepted: 01/08/2024] [Indexed: 02/03/2024]
Abstract
STATEMENT OF PROBLEM Time and cost are factors that influence a patient's decision on dental prosthetic treatment. Evidence is needed to demonstrate that restoration using digital systems is more rapid and less costly than the conventional process. PURPOSE The purpose of this systematic review was to analyze and compare the duration and cost of fixed dental prostheses fabricated using digital and conventional methods from scanning or impression making to delivery of the prosthesis. MATERIAL AND METHODS A systematic review was performed following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis Protocol (PRISMA-P 2015) guidelines. The analysis methods and inclusion criteria were documented in a protocol registered in the Prospective International Register of Systematic Reviews (PROSPERO) (CRD42023458734). The bibliographic search was carried out using PubMed, Cochrane, and PROSPERO databases. The main keywords used were (Prosthodontic OR restorative dentistry OR denture) AND (CAD CAM OR Digital workflow OR Computer Dentistry OR Digital Design) AND (Economic OR cost OR Financial OR time efficiency). Two investigators undertook the different steps of article selection. RESULTS A total of 8 articles published between 2010 and 2023 were found for the qualitative synthesis by using the search criteria. Two studies showed that conventional impressions took more time than digital scans for the fabrication of a single crown, and 1 study showed the opposite. One study found that a digital scan was faster than conventional impression making for the fabrication of a 3-unit fixed partial denture, and another study showed the opposite. The dental laboratory technician spent more time on the conventional workflow than the digital workflow for the 3-unit framework and veneering process. No difference was found between conventional and digital workflows for clinical evaluation and chairside adjustment for the fabrication of a single crown. No articles have compared the cost of fixed prostheses. CONCLUSIONS The digital pathway can shorten the laboratory process. However, the duration of the impression or scan may vary depending on the technique used. Studies are needed to analyze the cost-effectiveness of the fabrication of tooth-supported restorations.
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Affiliation(s)
- Marion Bessadet
- Vice Dean, Senior Lecturer, Department of Prosthodontics, UFR d'Odontologie, Clinical Odontology Research Center (CROC), University of Clermont Auvergne, Clermont-Ferrand, France; and Hospital Practitioner, CHU Clermont-Ferrand, Odontology Department, Clermont-Ferrand, France
| | - Noémie Drancourt
- Lecturer, Department of Prosthodontics, UFR d'Odontologie, Clinical Odontology Research Center (CROC), University of Clermont Auvergne, Clermont-Ferrand, France; and Hospital Practitioner, CHU Clermont-Ferrand, Odontology Department, Clermont-Ferrand, France
| | - Nada El Osta
- Professor, Department of Prosthodontics, UFR d'Odontologie, Clinical Odontology Research Center (CROC), University of Clermont Auvergne, Clermont-Ferrand, France.
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7
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Thomas AA, Daniel AY, Gandhi N, Roy N, Varghese KG, Wadhwa S, Mathew JE. Surface trueness and precision of interim restorations fabricated by digital light processing and CAD-CAM milling systems. J Prosthet Dent 2023; 130:611.e1-611.e7. [PMID: 37643941 DOI: 10.1016/j.prosdent.2023.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/13/2023] [Accepted: 07/13/2023] [Indexed: 08/31/2023]
Abstract
STATEMENT OF PROBLEM The development of digital dental technologies has enabled clinicians to use additive and subtractive manufacturing techniques to fabricate interim restorations. However, knowledge of the trueness and precision of such restorations fabricated using digital light processing (DLP) and computer-aided design and computer-aided manufacturing (CAD-CAM) methods is limited. PURPOSE The purpose of this in vitro study was to assess and compare the accuracy of interim crowns fabricated using DLP and CAD-CAM methods. MATERIAL AND METHODS A typodont mandibular first molar was prepared for a ceramic crown, and a digital scan (Medit T500) was obtained to design interim crowns by using the CAD software program. The CAD data were designated as the reference data. A total of 20 crowns were fabricated by DLP and CAD-CAM technology. The fabricated interim crowns were further scanned using a laboratory scanner and were superimposed with the CAD data by using a 3-dimensional (3D) point cloud assessing software program (CloudCompare) for the evaluation of trueness and precision. Root mean square values (RMS) were obtained for the evaluation of discrepancies. The Student t test was used to compare data as the Shapiro-Wilk test confirmed the normal distribution. RESULTS RMS values for the trueness values of the external and intaglio surfaces of the 3D printed and milled interim crown displayed no statistically significant differences (P>.05). Precision for the external surface reported significance (P<.05), whereas that for the intaglio surface reported no significance (P>.05). CONCLUSIONS The accuracy of interim crowns fabricated by using DLP was comparable with that of milled crowns. Both manufacturing systems produced a true reproduction of the CAD. As for precision, the external surface of the DLP interim crown was statistically different from that of the milled group as it relates to the CAD.
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Affiliation(s)
- Achsah Ann Thomas
- Postgraduate Resident, Department of Prosthodontics and Crown & Bridge, Christian Dental College, Ludhiana, Punjab, India.
| | - Angleena Y Daniel
- HOD & Professor, Department of Prosthodontics and Crown & Bridge, Christian Dental College, Ludhiana, Punjab, India
| | - Nitasha Gandhi
- Ex-Professor, Department of Prosthodontics and Crown & Bridge, Christian Dental College, Ludhiana, Punjab, India
| | - Neethu Roy
- Associate Professor, Department of Prosthodontics and Crown & Bridge, Christian Dental College, Ludhiana, Punjab, India
| | - Kevin George Varghese
- Assistant Professor, Department of Prosthodontics and Crown & Bridge, Christian Dental College, Ludhiana, Punjab, India..
| | - Samiksha Wadhwa
- Postgraduate Resident, Department of Prosthodontics and Crown & Bridge, Christian Dental College, Ludhiana, Punjab, India
| | - Jemin Elizabeth Mathew
- Postgraduate Resident, Department of Prosthodontics and Crown & Bridge, Christian Dental College, Ludhiana, Punjab, India
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Alageel O, Alhijji S, Alsadon O, Alsarani M, Gomawi AA, Alhotan A. Trueness, Flexural Strength, and Surface Properties of Various Three-Dimensional (3D) Printed Interim Restorative Materials after Accelerated Aging. Polymers (Basel) 2023; 15:3040. [PMID: 37514429 PMCID: PMC10384054 DOI: 10.3390/polym15143040] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 07/07/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023] Open
Abstract
Various 3D printing systems for interim fixed dental restorations are commercially available. This study aimed to evaluate the physical and mechanical properties of 3D printed resins used for interim restorations fabricated using various 3D printing systems and printing angulations after accelerated aging. Three different interim restorative materials were provided and printed using their specific 3D printing systems (A: NextDent; B: Asiga; C: Nova3D), and the testing specimens from each system were printed at two building angles: (1) 0° and (2) 90°. The six groups were A1, A2, B1, B2, C1, and C2, with sixteen specimens per group. Half of the specimens in each group (N = 8) were subjected to accelerated aging, including simulated brushing and thermocycling. Three-point bending, surface roughness, and Vickers microhardness tests were performed. Two-way ANOVA and Fisher's multiple tests were used for statistical analyses. The most accurate systems were found in groups C1 and C2 for length, A1 and B1 for width, and A1 and C1 for height. The specimen trueness only changed after aging for groups B1, B2, and C1. The flexural strength of the A2 group (151 ± 7 MPa) before aging was higher than that of the other groups, and the strength decreased after aging only for groups A1 and A2. The flexural strength, microhardness, and surface roughness of the 3D printed interim resins after aging varied depending on the material, system used, and printing angle.
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Affiliation(s)
- Omar Alageel
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh 12372, Saudi Arabia
| | - Saleh Alhijji
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh 12372, Saudi Arabia
| | - Omar Alsadon
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh 12372, Saudi Arabia
| | - Majed Alsarani
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh 12372, Saudi Arabia
| | | | - Abdulaziz Alhotan
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh 12372, Saudi Arabia
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Al-humood H, Alfaraj A, Yang CC, Levon J, Chu TMG, Lin WS. Marginal Fit, Mechanical Properties, and Esthetic Outcomes of CAD/CAM Interim Fixed Dental Prostheses (FDPs): A Systematic Review. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1996. [PMID: 36903109 PMCID: PMC10004428 DOI: 10.3390/ma16051996] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/20/2023] [Accepted: 02/25/2023] [Indexed: 06/18/2023]
Abstract
This systematic review aimed to study the outcomes of CAD-CAM (milled and 3D-printed) interim dental prostheses when compared to conventional ones. The focused question of "In natural teeth, what are the outcomes of CAD-CAM interim FDPs compared to the conventionally-manufactured ones regarding marginal fit, mechanical properties, esthetics, and color stability" was formulated. The systematic search was conducted electronically in the PubMed/MEDLINE, CENTRAL, EMBASE, Web of Science, New York Academy of Medicine Grey Literature Report, and Google Scholar databases by using the MeSH keywords and keywords associated with the focused question and limiting articles to those published between 2000 and 2022. A manual search was conducted in selected dental journals. The results were analyzed qualitatively and are presented in table format. Of the included studies, 18 studies were in vitro and 1 was a randomized clinical trial. Of the eight studies analyzing the mechanical properties, five studies favored the milled interim restorations, one study favored both 3D-printed and milled interim restorations, and two studies reported better mechanical properties in conventional interim restorations. Among four studies evaluating the marginal discrepancies, two studies favored the marginal fit in milled interim restorations, one study reported a better marginal fit in both milled and 3D-printed interim restorations, and one study found conventional interim restorations have a better marginal fit and smaller marginal discrepancy when compared to both milled and 3D-printed restorations. Among five studies that evaluated both the mechanical properties and marginal fit, 1 study favored 3D-printed interim restorations and four studies favored milled interim restorations over the conventional ones. Two studies analyzing the esthetics outcomes demonstrated better results with milled interim restorations compared to conventional and 3D-printed interim restorations in terms of their color stabilities. The risk of bias was low for all the studies reviewed. The high level of heterogeneity within the studies excluded meta-analysis. Most of the studies favored the milled interim restorations over the 3D-printed and conventional restorations. The results suggested that milled interim restorations offer a better marginal fit, higher mechanical properties, and better esthetic outcomes in terms of color stabilities.
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The Complete Digital Workflow in Fixed Prosthodontics Updated: A Systematic Review. Healthcare (Basel) 2023; 11:healthcare11050679. [PMID: 36900684 PMCID: PMC10001159 DOI: 10.3390/healthcare11050679] [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: 01/23/2023] [Revised: 02/18/2023] [Accepted: 02/22/2023] [Indexed: 03/03/2023] Open
Abstract
Digital applications have changed therapy in prosthodontics. In 2017, a systematic review reported on complete digital workflows for treatment with tooth-borne or implant-supported fixed dental prostheses (FDPs). Here, we aim to update this work and summarize the recent scientific literature reporting complete digital workflows and to deduce clinical recommendations. A systematic search of PubMed/Embase using PICO criteria was performed. English-language literature consistent with the original review published between 16 September 2016 and 31 October 2022 was considered. Of the 394 titles retrieved by the search, 42 abstracts were identified, and subsequently, 16 studies were included for data extraction. A total of 440 patients with 658 restorations were analyzed. Almost two-thirds of the studies focused on implant therapy. Time efficiency was the most often defined outcome (n = 12/75%), followed by precision (n = 11/69%) and patient satisfaction (n = 5/31%). Though the amount of clinical research on digital workflows has increased within recent years, the absolute number of published trials remains low, particularly for multi-unit restorations. Current clinical evidence supports the use of complete digital workflows in implant therapy with monolithic crowns in posterior sites. Digitally fabricated implant-supported crowns can be considered at least comparable to conventional and hybrid workflows in terms of time efficiency, production costs, precision, and patient satisfaction.
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Valenti M, Valenti A, Schmitz JH, Cortellini D, Canale A. Survival analysis up to 7 years of 621 zirconia monolithic single crowns with feather-edge margins fabricated with a cast-free workflow starting from intraoral scans: A multicentric retrospective study. J Prosthet Dent 2023; 129:76-82. [PMID: 35850872 DOI: 10.1016/j.prosdent.2022.05.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 05/12/2022] [Accepted: 05/13/2022] [Indexed: 01/18/2023]
Abstract
STATEMENT OF PROBLEM Clinical studies on the fabrication of monolithic zirconia restorations with a feather-edge tooth preparation from digital scans and a cast-free fully digital workflow are lacking. PURPOSE The purpose of this retrospective multicentric study in private practices was to evaluate the outcomes of monolithic zirconia crowns fabricated with feather-edge margins and a cast-free approach. MATERIAL AND METHODS A total of 621 teeth were prepared with feather-edge margins and restored with monolithic zirconia crowns fabricated with a fully digital cast-free workflow. Data were analyzed by using the Kaplan-Meier test and descriptive statistics. The clinical evaluation adopted the California Dental Association-modified criteria after recalling all patients between April and July 2021. RESULTS The clinical survival of 619 of 621 crowns, including recemented crowns placed in 427 patients (217 men, 220 women) over 5 years (2014 to 2019 with crowns in service between 12 and 85 months), was analyzed. The 2 excluded crowns were delivered to patients who dropped out of the study. Of the 619 crowns, 5 failed during the follow-up period: 4 teeth were extracted because of fracture and 1 restoration fractured. No other technical or biological failures were observed. The mean overall survival time was 84.4 months (standard error, 0.255; 95% confidence interval for the mean, 83.92 to 84.92). The overall survival probability was 99.1% up to 85 months. CONCLUSIONS The clinical outcomes of the monolithic zirconia crowns with feather-edge margins evaluated were comparable with outcomes reported using other margin designs and materials.
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Alageel O, Alsadon O, Almansour H, Alshehri A, Alhabbad F, Alsarani M. Assessment of effect of accelerated aging on interim fixed dental materials using digital technologies. J Adv Prosthodont 2022; 14:360-368. [PMID: 36685789 PMCID: PMC9832148 DOI: 10.4047/jap.2022.14.6.360] [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: 08/22/2022] [Revised: 11/10/2022] [Accepted: 11/18/2022] [Indexed: 12/28/2022] Open
Abstract
PURPOSE This study assessed the physical and mechanical properties of interim crown materials fabricated using various digital techniques after accelerated aging. MATERIALS AND METHODS Three groups of interim dental restorative materials (N = 20) were tested. The first group (CO) was fabricated using a conventional manual method. The second group (ML) was prepared from prefabricated resin blocks for the milling method and cut into specimen sizes using a cutting disc. The third group (3D) was additively manufactured using a digital light-processing (DLP) 3D printer. Aging acceleration treatments using toothbrushing and thermocycling simulators were applied to half of the specimens corresponding to three years of usage in the oral environment (N = 10). Surface roughness (Ra), Vickers microhardness, 3-point bending, sorption, and solubility tests were performed. A 2-way analysis of variance (ANOVA) and Fisher's multiple comparison test were used to compare the results among the groups. RESULTS The mean surface roughness (Ra) of the resin after accelerated aging was significantly higher in the CO and ML groups than that before aging, but not in the 3D group. All groups showed reduced hardness after accelerated aging. The flexural strength values were highest in the 3D group, followed by the ML and CO groups after accelerated aging. Accelerated aging significantly reduced water sorption in the ML group. CONCLUSION According to the tested material and 3D printer type, both 3D-printed and milled interim restoration resins showed higher flexural strength and modulus, and lower surface roughness than those prepared by the conventional method after accelerated aging.
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Affiliation(s)
- Omar Alageel
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Omar Alsadon
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.,Engineer Abdullah Bugshan Research Chair for Dental and Oral Rehabilitation, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Haitham Almansour
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Abdullah Alshehri
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Fares Alhabbad
- Dental University Hospital, King Saud University Medical City, Riyadh, Saudi Arabia
| | - Majed Alsarani
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
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Yang CH, Cheng CW, Ye SY, Chien CH. A double blinded trial to compare the patient satisfaction and crown accuracy of two different intraoral scanners for the fabrication of monolithic lithium disilicate single crowns. J Dent Sci 2022. [DOI: 10.1016/j.jds.2022.08.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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14
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Abstract
Smile designing refers to the cosmetic and esthetic dental reconstruction that is visible during smiling. The use of modern digital tools requires adequate knowledge about the tooth shape and shade principles. Mechanical, biological, and psychological factors should be understood and tailor an individualized treatment accordingly to achieve pleasing esthetic outcomes. Dental therapy is becoming more appearance-driven, and thus, both patients and dental clinicians mainly emphasize on cosmetic dental and facial aspects of treatments.
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Affiliation(s)
- Marzieh Alikhasi
- Dental Implant Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran 1439955991, Iran.
| | - Parisa Yousefi
- Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Hezar Jarib Street, Isfahan 8174673461, Isfahan Province, Iran
| | - Kelvin I Afrashtehfar
- Evidence-Based Practice Unit, Disciplines of Prosthodontology and Implantology, Division of Restorative Dental Sciences, Clinical Sciences Department, Ajman University College of Dentistry, PO Box 346 Ajman City, Ajman Emirate, UAE; Department of Reconstructive Dentistry & Gerodontology, School of Dental Medicine (ZMK), Faculty of Medicine, University of Bern, Freiburgstrasse 7, Bern 3010, BE, Switzerland.
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Li L, Chen H, Li W, Wang Y, Sun Y. Design of wear facets of mandibular first molar crowns by using patient-specific motion with an intraoral scanner: A clinical study. J Prosthet Dent 2021; 129:710-717. [PMID: 34426014 DOI: 10.1016/j.prosdent.2021.06.048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 06/29/2021] [Accepted: 06/29/2021] [Indexed: 11/24/2022]
Abstract
STATEMENT OF PROBLEM Although computer-aided design has become popular, restorations are typically designed from static occlusion and dynamically by using an average-value virtual articulator. Patient-specific motion recorded by using an intraoral scanner has rarely been used to design restorations, and its design ability has not been analyzed. PURPOSE The purpose of this clinical study was to record patient-specific motion by using an intraoral scanner and to analyze its ability to design the morphology of the wear facets on mandibular first molar crowns. MATERIAL AND METHODS An intraoral scanner was used to scan complete arch digital casts and to record patient-specific motion of 11 participants. Right and left mandibular first molars were selected as the target teeth. The complete crown preparations of the target teeth were virtually prepared on the digital mandibular casts by using the Geomagic Studio 2013 software program. High points were created by elevating the wear facets of the target teeth by 0.3 mm in the occlusal direction to generate digital wax patterns. The Dental System software program was used to design crowns with the anatomic coping design method. Occlusal adjustment with static occlusion (STA crown), with the average-value virtual articulator (DYN crown), and with patient-specific motion (FUN crown) was carried out. The crowns adjusted with these 3 methods were compared with the original wear facets. The mean value and root mean square (RMS) of 3D deviation were measured. One-way ANOVA was used to analyze the influence of the occlusal surface design methods on the morphology of the wear facets (α=.05). RESULTS The STA crowns had the poorest results with the mean ±standard deviation 3D deviation value of 0.15 ±0.05 mm and RMS value of 0.19 ±0.04 mm. The best results occurred in the FUN group, with the mean ±standard deviation 3D deviation value of 0.05 ±0.06 mm and RMS value of 0.13 ±0.03 mm. Significant differences were found among the 3 groups (P<.01). Except for the RMS value between the STA and DYN groups, significant differences were found between groups from the pairwise comparisons. CONCLUSIONS The occlusal surface of the crowns designed by using the patient-specific motion recorded with the intraoral scanner had the best coincidence with the morphology of the wear facets on the original teeth.
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Affiliation(s)
- Linlin Li
- Doctoral student, Faculty of Prosthodontics, Center of Digital Dentistry, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Research Center of Engineering and Technology for Digital Dentistry of Ministry of Health & Beijing Key Laboratory of Digital Stomatology, National Clinical Research Center for Oral Diseases, Beijing, PR China
| | - Hu Chen
- Attending Doctor, Faculty of Prosthodontics, Center of Digital Dentistry, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Research Center of Engineering and Technology for Digital Dentistry of Ministry of Health & Beijing Key Laboratory of Digital Stomatology, National Clinical Research Center for Oral Diseases, Beijing, PR China
| | - Weiwei Li
- Postdoctoral, Faculty of Prosthodontics, Center of Digital Dentistry, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Research Center of Engineering and Technology for Digital Dentistry of Ministry of Health & Beijing Key Laboratory of Digital Stomatology, National Clinical Research Center for Oral Diseases, Beijing, PR China
| | - Yong Wang
- Professor, Faculty of Prosthodontics, Center of Digital Dentistry, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Research Center of Engineering and Technology for Digital Dentistry of Ministry of Health & Beijing Key Laboratory of Digital Stomatology, National Clinical Research Center for Oral Diseases, Beijing, PR China
| | - Yuchun Sun
- Professor, Faculty of Prosthodontics, Center of Digital Dentistry, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Research Center of Engineering and Technology for Digital Dentistry of Ministry of Health & Beijing Key Laboratory of Digital Stomatology, National Clinical Research Center for Oral Diseases, Beijing, PR China.
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16
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Lee BI, You SG, You SM, Kim DY, Kim JH. Evaluating the accuracy (trueness and precision) of interim crowns manufactured using digital light processing according to post-curing time: An in vitro study. J Adv Prosthodont 2021; 13:89-99. [PMID: 34025957 PMCID: PMC8110736 DOI: 10.4047/jap.2021.13.2.89] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/16/2021] [Accepted: 03/26/2021] [Indexed: 01/14/2023] Open
Abstract
PURPOSE This study aimed to compare the accuracy (trueness and precision) of interim crowns fabricated using DLP (digital light processing) according to post-curing time. MATERIALS AND METHODS A virtual stone study die of the upper right first molar was created using a dental laboratory scanner. After designing interim crowns on the virtual study die and saving them as Standard Triangulated Language files, 30 interim crowns were fabricated using a DLP-type 3D printer. Additively manufactured interim crowns were post-cured using three different time conditions-10-minute post-curing interim crown (10-MPCI), 20-minute post-curing interim crown (20-MPCI), and 30-minute post-curing interim crown (30-MPCI) (n = 10 per group). The scan data of the external and intaglio surfaces were overlapped with reference crown data, and trueness was measured using the best-fit alignment method. In the external and intaglio surface groups (n = 45 per group), precision was measured using a combination formula exclusive to scan data (10C2). Significant differences in accuracy (trueness and precision) data were analyzed using the Kruskal-Wallis H test, and post hoc analysis was performed using the Mann-Whitney U test with Bonferroni correction (α=.05). RESULTS In the 10-MPCI, 20-MPCI, and 30-MPCI groups, there was a statistically significant difference in the accuracy of the external and intaglio surfaces (P <.05). On the external and intaglio surfaces, the root mean square (RMS) values of trueness and precision were the lowest in the 10-MPCI group. CONCLUSION Interim crowns with 10-minute post-curing showed high accuracy.
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Affiliation(s)
- Beom-Il Lee
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea.,Interdisciplinary Program in Precision Public Health, Korea University, Seoul, Republic of Korea
| | - Seung-Gyu You
- Health Science Research Institute, College of Health Science, Korea University, Seoul, Republic of Korea
| | - Seung-Min You
- Health Science Research Institute, College of Health Science, Korea University, Seoul, Republic of Korea
| | | | - Ji-Hwan Kim
- Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea
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Lim JH, Mangal U, Nam NE, Choi SH, Shim JS, Kim JE. A Comparison of Accuracy of Different Dental Restorative Materials between Intraoral Scanning and Conventional Impression-Taking: An In Vitro Study. MATERIALS 2021; 14:ma14082060. [PMID: 33921830 PMCID: PMC8073328 DOI: 10.3390/ma14082060] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/15/2021] [Accepted: 04/18/2021] [Indexed: 11/16/2022]
Abstract
The properties of underlying substrates influence the quality of an intraoral scan, but few studies have compared the outcomes using common restorative materials. In this study, we aimed to compare the accuracy of digital and conventional impressions recorded for four different dental materials as the substrates. Experimental crowns were produced with a metallic surface (gold or cobalt-chromium alloy (Co-Cr)) or without a metallic surface (zirconia or PMMA (polymethyl methacrylate)). A conventional impression was made in the conventional group (CON group), and gypsum models were subsequently scanned with a tabletop scanner. An intraoral scanner was used to scan the crowns either after applying a powder spray to reduce the surface reflectivity (IOS-P group) or without the powder spray (IOS group). The scans were assessed in three dimensions for precision and trueness. The accuracy did not differ between the CON and IOS groups for the non-metallic crowns. However, it was statistically different for the Co-Cr metallic crown, reducing trueness observed between groups as CON > IOS > IOS-P. The study evidences the differences in outer surface accuracy observed with a change in the substrate material to be imaged using an oral scanner and with the impression method. These findings suggest that the restoration material present in the oral cavity should be considered when selecting an impression-taking method.
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Affiliation(s)
- Jung-Hwa Lim
- Oral Research Science Center, Department of Prosthodontics, Yonsei University College of Dentistry, Seoul 03722, Korea; (J.-H.L.); (N.-E.N.)
| | - Utkarsh Mangal
- Institute of Craniofacial Deformity, Department of Orthodontics, Yonsei University College of Dentistry, Seoul 03722, Korea; (U.M.); (S.-H.C.)
| | - Na-Eun Nam
- Oral Research Science Center, Department of Prosthodontics, Yonsei University College of Dentistry, Seoul 03722, Korea; (J.-H.L.); (N.-E.N.)
| | - Sung-Hwan Choi
- Institute of Craniofacial Deformity, Department of Orthodontics, Yonsei University College of Dentistry, Seoul 03722, Korea; (U.M.); (S.-H.C.)
| | - June-Sung Shim
- Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea;
| | - Jong-Eun Kim
- Department of Prosthodontics, Yonsei University College of Dentistry, Yonsei-ro 50-1, Seodaemun-gu, Seoul 03722, Korea;
- Correspondence: ; Tel.: +82-2-2228-3166
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Bond strength of three chairside crown reline materials to milled polymethyl methacrylate resin. J Prosthet Dent 2020; 125:544.e1-544.e8. [PMID: 33243474 DOI: 10.1016/j.prosdent.2020.10.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 10/23/2020] [Accepted: 10/26/2020] [Indexed: 11/22/2022]
Abstract
STATEMENT OF PROBLEM Information on the bond strength of milled polymethyl methacrylate interim restorations when relined with chairside reline materials is lacking. PURPOSE The purpose of this in vitro study was to measure the shear bond strength of various combinations of 3 different chairside reline materials bonded to milled polymethyl methacrylate blocks with 3 different types of surface treatments. MATERIALS AND METHODS Uniform blocks (10×10×22 mm) were milled from tooth-colored polymethyl methacrylate disks (Vivid PMMA; Pearson Dental Supply Co). The surface treatments tested were airborne-particle abrasion with 50-μm particle size aluminosilicate, application of acrylic resin monomer (Jet Liquid; Lang Dental Manufacturing Co) for 180 seconds, and airborne-particle abrasion with monomer application. The control groups were blocks with no surface treatment. The chairside reline materials tested were Jet acrylic resin (Jet Powder; Lang Dental Manufacturing Co), bis-acryl resin (Integrity; Dentsply Sirona), and flowable composite resin (Reveal; Bisco). All materials were applied through a Ø1.5×3-mm bonding ring. Ten specimens for each of the 12 groups were tested in a universal testing machine. Load was applied at a crosshead speed of 1 mm/min. Fracture surfaces were then analyzed for cohesive versus adhesive or mixed failure. Data were analyzed using 2-way ANOVA and Tukey-Kramer post hoc analysis (α=.05). RESULTS The mean shear bond strength values ranged from 1.77 ±0.79 MPa to 28.49 ±5.75 MPa. ANOVA revealed that reline material (P<.05), surface treatment (P<.05), and their interactions (P<.05) significantly affected the shear bond strength among the experimental groups. The strongest combination was Jet acrylic resin applied on specimens treated with airborne-particle abrasion and monomer. All 3 failure modalities (adhesive, cohesive, and mixed modes) were observed. CONCLUSIONS Of the materials tested, the most reliable material to bond to milled polymethyl methacrylate was Jet acrylic resin, and the bond strength values were increased substantially when the milled polymethyl methacrylate surface was airborne-particle abraded and monomer was applied.
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Ahn JJ, Bae EB, Lee JJ, Choi JW, Jeon YC, Jeong CM, Yun MJ, Lee SH, Lee KB, Huh JB. Clinical evaluation of the fit of lithium disilicate crowns fabricated with three different CAD-CAM systems. J Prosthet Dent 2020; 127:239-247. [PMID: 33246562 DOI: 10.1016/j.prosdent.2020.06.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 06/16/2020] [Accepted: 06/16/2020] [Indexed: 10/22/2022]
Abstract
STATEMENT OF PROBLEM The fit and performance of prostheses fabricated using various computer-aided design and computer-aided manufacturing (CAD-CAM) systems have been evaluated. However, most studies were conducted in vitro, and relatively few have addressed gingival parameters and prosthesis fit under clinical conditions. PURPOSE This clinical study aimed to compare the fit of lithium disilicate crowns produced using 3 CAD-CAM systems and evaluate clinical results up to 6 months after delivery. MATERIAL AND METHODS Forty participants requiring a single crown were recruited. Three monolithic lithium disilicate crowns were fabricated per participant by using 3 different CAD-CAM systems (intraoral scanners, CAD software, and milling machines): CEREC group (CEREC Bluecam, CEREC AC, CEREC MC); EZIS group (EZIS PO, EZIS VR, EZIS HM); and TRIOS group (TRIOS 3, EXO-CAD, ARUM-4X). The fit of the prostheses was assessed via a silicone replica technique, and the most acceptable crown was delivered; 12 were selected from the CEREC group, 16 from the EZIS group, and 12 from the TRIOS group. Follow-up clinical examinations were performed at 1, 3, and 6 months after delivery. The Kruskal-Wallis test with the post hoc Mann-Whitney U test was conducted to analyze significant differences in crown fit and periodontal conditions among the groups (α=.05). RESULTS The marginal gap of the CEREC group was significantly higher than that of the EZIS group, and the occlusal gap of the EZIS group was significantly lower than those of the CEREC and TRIOS groups (P<.05). Probing depth, bleeding index, and plaque index showed no intergroup differences at 6 months (P>.05). CONCLUSIONS The lithium disilicate crowns of all groups showed clinically acceptable fit. No significant differences were found among the groups in terms of periodontal conditions after 6 months.
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Affiliation(s)
- Jong-Ju Ahn
- Graduate student, Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Eun-Bin Bae
- Doctoral Researcher, Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Jin-Ju Lee
- Graduate student, Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Jae-Won Choi
- Postdoctoral Researcher, Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Young-Chan Jeon
- Professor, Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Chang-Mo Jeong
- Professor, Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Mi-Jung Yun
- Professor, Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - So-Hyoun Lee
- Assistant Professor, Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Kyu-Bok Lee
- Associate Professor, Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea
| | - Jung-Bo Huh
- Associate Professor, Department of Prosthodontics, Dental Research Institute, Institute of Translational Dental Sciences, BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan, Republic of Korea.
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Samra APB, Pomini M, Granville F, Zavolski A, Oliveira FBD, Dias AH. Three-dimensional printed models versus conventional stone models. BRAZILIAN JOURNAL OF ORAL SCIENCES 2020. [DOI: 10.20396/bjos.v19i0.8659937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Aim: To compare the accuracy (trueness and precision)of cost-accessible three-dimensional (3D) printed models.Methods: A maxillary typodont (MM) was scanned andprinted 10 times in polylactic acid, resulting in 10 digitalmodels (DMs). Polyvinylsiloxane impressions were made toobtain 10 conventional stone models (SMs). All models werescanned and imported to CloudCompare software. The totalarea and three locations of interest were evaluated (zenith toincisal [Z-I], canine to canine [C-C], and first molar to canine[1M-C] distances). Total area evaluations were performed byaligning the MM and experimental models using the best-fitalgorithm and were compared using the Haussdorf distance.The distances between points of interest were measured usingthe point-picking tool at the same 3D coordinates. The meanvolumetric deviations were considered for trueness analysis.Precision was set as the standard deviation. Statisticaldifferences were evaluated using the Student’s t-test. Results:Total area volumetric comparisons showed that DMs showedsuperior trueness and precision (-0.02 ± 0.03) compared tothe SMs (0.37 ± 0.29) (P < 0.001). No differences between themodels were observed for Z-I (P = .155); however, SMs showedfewer deviations for C-C (P = .035) and 1M-C (P = .001) thanDMs. Conclusions: The DMs presented superior trueness andprecision for total area compared to the SMs; however, the SMswere more accurate when points of interest were evaluated.
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A reverse digital workflow by using an interim restoration scan and patient-specific motion with an intraoral scanner. J Prosthet Dent 2020; 126:19-23. [PMID: 32763090 DOI: 10.1016/j.prosdent.2020.05.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/05/2020] [Accepted: 05/05/2020] [Indexed: 11/23/2022]
Abstract
Interim crowns provide important information as they have been evaluated on patients and can guide the choice of optimal tooth shape, occlusal vertical dimension, and anterior guidance. A protocol with a reverse digital workflow and dynamic occlusion recorded by using an intraoral scanner is presented.
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