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Sokolowski A, Horak D, Behlau A, Madreiter-Sokolowski C, Lorenzoni M, Sokolowski A. Evaluation of two printing techniques for maxillary removable partial denture frameworks. J Prosthet Dent 2024; 131:707.e1-707.e8. [PMID: 38331670 DOI: 10.1016/j.prosdent.2024.01.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 01/18/2024] [Accepted: 01/18/2024] [Indexed: 02/10/2024]
Abstract
STATEMENT OF PROBLEM Three-dimensional (3D) printing technology has gained popularity in producing removable partial denture (RPD) frameworks, including direct 3D printing of the metal framework and framework printing using castable resin, subsequently cast and processed. However, whether the technology is sufficiently accurate and precise to supersede traditional methods is unclear. PURPOSE The purpose of this in vitro study was to determine the accuracy and precision of 2 different methods in the fabrication of RPD frameworks, including 3D printing by selective laser melting (SLM) and digital light processing (DLP). MATERIAL AND METHODS Maxillary casts were digitized to design RPD frameworks. Thereby, 8 frameworks were produced for each group. The SLM group underwent a thermal finishing process after printing. In the DLP group, castable resin was printed but not cast. All frameworks were scanned to generate digital files, which were then compared with the original design using a metrology software program and manual measurements. Statistical analysis was executed using the t-test for independent specimens (α=.05) and by comparing heatmaps of the overlaid meshes. RESULTS The analysis of the frameworks indicated minor deviations across all specimens. Regarding accuracy, there were no significant differences between the groups (P=.986). The SLM frameworks demonstrated greater precision, with absolute deviation values of 0.13 mm compared with 0.17 mm in the DLP group (P<.001). CONCLUSIONS The findings underscored a high consistency between the 2 printing techniques, demonstrating a sufficiently advanced production process to yield predictable results. While the accuracy of both techniques was at a comparably high level and did not differ significantly, the SLM technique delivered RPDs with higher precision.
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Affiliation(s)
- Alwin Sokolowski
- Research Associate, Division of Restorative Dentistry, Periodontology and Prosthodontics, Department of Dental Medicine and Oral Health, Medical University of Graz, Graz, Austria
| | - Daniel Horak
- Graduate student, Division of Restorative Dentistry, Periodontology and Prosthodontics, Department of Dental Medicine and Oral Health, Medical University of Graz, Graz, Austria
| | - Alexander Behlau
- Research Associate, Division of Restorative Dentistry, Periodontology and Prosthodontics, Department of Dental Medicine and Oral Health, Medical University of Graz, Graz, Austria
| | - Corina Madreiter-Sokolowski
- Associate Professor, Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Martin Lorenzoni
- Head of Division, Division of Restorative Dentistry, Periodontology and Prosthodontics, Department of Dental Medicine and Oral Health, Medical University of Graz, Graz, Austria
| | - Armin Sokolowski
- Research Associate, Division of Restorative Dentistry, Periodontology and Prosthodontics, Department of Dental Medicine and Oral Health, Medical University of Graz, Graz, Austria.
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Caussin E, Moussally C, Le Goff S, Fasham T, Troizier-Cheyne M, Tapie L, Dursun E, Attal JP, François P. Vat Photopolymerization 3D Printing in Dentistry: A Comprehensive Review of Actual Popular Technologies. MATERIALS (BASEL, SWITZERLAND) 2024; 17:950. [PMID: 38399200 PMCID: PMC10890271 DOI: 10.3390/ma17040950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 02/09/2024] [Accepted: 02/13/2024] [Indexed: 02/25/2024]
Abstract
In this comprehensive review, the current state of the art and recent advances in 3D printing in dentistry are explored. This article provides an overview of the fundamental principles of 3D printing with a focus on vat photopolymerization (VP), the most commonly used technological principle in dental practice, which includes SLA, DLP, and LCD (or mSLA) technologies. The advantages, disadvantages, and shortcomings of these technologies are also discussed. This article delves into the key stages of the dental 3D printing process, from computer-aided design (CAD) to postprocessing, emphasizing the importance of postrinsing and postcuring to ensure the biocompatibility of custom-made medical devices. Legal considerations and regulatory obligations related to the production of custom medical devices through 3D printing are also addressed. This article serves as a valuable resource for dental practitioners, researchers, and health care professionals interested in applying this innovative technology in clinical practice.
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Affiliation(s)
- Elisa Caussin
- Faculty of Dental Surgery, University of Paris Cité, 75006 Paris, France
- Bretonneau Hospital, Assistance Publique des Hôpitaux de Paris (AP-HP), 75018 Paris, France
- Université of Paris Cité, URB2i, 92100 Montrouge, France
| | | | - Stéphane Le Goff
- Faculty of Dental Surgery, University of Paris Cité, 75006 Paris, France
- Université of Paris Cité, URB2i, 92100 Montrouge, France
| | - Timothy Fasham
- Faculty of Dental Surgery, University of Paris Cité, 75006 Paris, France
- Bretonneau Hospital, Assistance Publique des Hôpitaux de Paris (AP-HP), 75018 Paris, France
- Université of Paris Cité, URB2i, 92100 Montrouge, France
| | - Max Troizier-Cheyne
- Faculty of Dental Surgery, University of Paris Cité, 75006 Paris, France
- Bretonneau Hospital, Assistance Publique des Hôpitaux de Paris (AP-HP), 75018 Paris, France
- Université of Paris Cité, URB2i, 92100 Montrouge, France
| | - Laurent Tapie
- Faculty of Dental Surgery, University of Paris Cité, 75006 Paris, France
- Université of Paris Cité, URB2i, 92100 Montrouge, France
- EPF École d’Ingénieurs, 94230 Cachan, France
| | - Elisabeth Dursun
- Faculty of Dental Surgery, University of Paris Cité, 75006 Paris, France
- Université of Paris Cité, URB2i, 92100 Montrouge, France
- Henri Mondor Hospital, AP-HP, 94000 Créteil, France
| | - Jean-Pierre Attal
- Faculty of Dental Surgery, University of Paris Cité, 75006 Paris, France
- Université of Paris Cité, URB2i, 92100 Montrouge, France
- Charles Foix Hospital, AP-HP, 94200 Ivry-Sur-Seine, France
| | - Philippe François
- Faculty of Dental Surgery, University of Paris Cité, 75006 Paris, France
- Bretonneau Hospital, Assistance Publique des Hôpitaux de Paris (AP-HP), 75018 Paris, France
- Université of Paris Cité, URB2i, 92100 Montrouge, France
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Cao J, Liu X, Cameron A, Aarts J, Choi JJE. Influence of different post-processing methods on the dimensional accuracy of 3D-printed photopolymers for dental crown applications - A systematic review. J Mech Behav Biomed Mater 2024; 150:106314. [PMID: 38113824 DOI: 10.1016/j.jmbbm.2023.106314] [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: 10/15/2023] [Revised: 12/05/2023] [Accepted: 12/07/2023] [Indexed: 12/21/2023]
Abstract
OBJECTIVES To perform a systematic review that provides an overview of the current literature on the influence of different post-processing methods on the accuracy of additive-manufactured (3D-printed) photopolymer crown materials, and whether more research is needed. MATERIALS AND METHODS The search used three online databases, Ovid (MEDLINE), Scopus and Web of Science which were screen for publications that involved assessing dimensional accuracy in post-processing of 3D printed dental crown materials. Publications that were literature reviews, abstracts, written in a language different from English, or publications that did not assess dimensional accuracy were excluded. RESULTS The included articles were published between 1995 and 2023. After the removal of duplicates using Endnote, 135 studies remained for further screening, 13 were selected for full-text analysis, and 7 studies were included in the systematic review. A total of 7 articles were examined and categorised based on several factors, such as the type of material, number of specimens per group, print layer thickness, print angle of specimens, 3D printer used, properties of the specimens studied, and the method of analysing the accuracy of the specimens. CONCLUSION It was found that post-processing washing times outside the prescribed instruction for use (IFU) may have an impact on the physical and biocompatibility characteristics of the material. Studies focusing on inert mediums during post-processing require more detailed investigation. The use of different post-curing conditions does not significantly affect the materials dimensional accuracy.
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Affiliation(s)
- Jason Cao
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, New Zealand
| | - Xiaoyun Liu
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, New Zealand
| | - Andrew Cameron
- School of Medicine and Dentistry, Griffith University, Australia; Member Centre of Biomedical and Rehabilitation Engineering, Menzies Health Institute Queensland, Australia
| | - John Aarts
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, New Zealand
| | - Joanne Jung Eun Choi
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, New Zealand.
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