Evaluation of marginal and internal gap under model-free monolithic zirconia restoration fabricated by digital intraoral scanner
Jongwon Lee,Ji-Man Park +1 more
TL;DR: Within the limitations of this study, the adaptation accuracy of model-free monolithic zirconia restoration fabricated by intraoral scanner exhibited clinically acceptable result, however, the margin of zIRconia crown showed tendency of overcontour and cautious clinical application and follow up is necessary.
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Abstract: Purpose: The aim of this study was to evaluate the marginal and internal adaptation of monolithic zirconia restoration made without physical model by digital intraoral scanner. Materials and methods: A prospective clinical trial was performed on 11 restorations as a pilot study. The monolithic zirconia restorations were fabricated after digital intraoral impression taking by intraoral scanner (TRIOS, 3shape, Copenhagen, Denmark), computer-aided designing, and milling manufacturing process. Completed zirconia crowns were tried in the patients' mouth and a replica technique was used to acquire the crown-abutment replica. The absolute marginal discrepancy, marginal gap, and internal gap of axial, line angle, and occlusal part were measured after sectioning the replica in the mesiodistal and buccolingual direction. Statistical analysis was performed using Kruskal-Wallis and Mann-Whitney U test (α=.05). Results: From the adaptation analysis by replica, the statistically significant difference was not found between mesiodistal and buccolingual sections (P>.05), but there was significant difference among the measurement location (P<.01). The amount of absolute marginal discrepancy was larger than those of marginal gap and internal gap (P<.01). Conclusion: Within the limitations of this study, the adaptation accuracy of model-free monolithic zirconia restoration fabricated by intraoral scanner exhibited clinically acceptable result. However, the margin of zirconia crown showed tendency of overcontour and cautious clinical application and follow up is necessary. (J Korean Acad Prosthodont 2016;54:210-7)
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Citations
In Vitro Study on Marginal and Internal Fit of CAD/CAM All-Ceramic Crowns
Hideaki Tanaka,Sohichiro Kinuta,Nobuyoshi Dei,Kazumichi Wakabayashi,Takeshi Akao,Yoshihiko Mutobe,Takashi Nakamura,Hirofumi Yatani +7 more
- 01 Mar 2005
TL;DR: The purpose of this study was to evaluate the marginal and internal fit of all-ceramic crowns fabricated using the Decsy CAD/CAM system and found that each experimental crown met the clinically acceptable criterion.
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Comparative assessment of marginal and internal gaps of cast-free monolithic zirconia crowns fabricated from 2 intraoral scanners: A prospective, double-blind, randomized clinical trial.
Su Min Cho,Kyung Chul Oh,Jiman Park,Jung Hwa Lim,Jae Sung Kwon +4 more
- 01 Aug 2022
TL;DR: In this article , the marginal and axial wall gaps of cast-free monolithic zirconia crowns fabricated by using a fully digital workflow were evaluated using a prospective randomized clinical trial.
6
References
Clinical evaluations of cast gold alloy, machinable zirconia, and semiprecious alloy crowns: A multicenter study
TL;DR: The marginal gaps of machinable Pd-Ag-In alloy crowns did not meet the noninferiority criterion in the distal margin compared with zirconia and gold Alloy crowns, Nonetheless, all 3 crowns had clinically applicable precision.
Marginal fit consistency of copy-milled all-ceramic crowns during fabrication by light and scanning electron microscopic analysis in vitro.
TL;DR: It is concluded that the manufacturing steps after copy milling have no obvious influence on the external marginal gap width and Scanning electron microscopic data seem to confirm the light-microscopic results.
Clinical evaluation of the marginal fit of cast crowns--validation of the silicone replica method.
TL;DR: This study validates a similar method that is of great clinical and experimental interest and compares different technical procedures of crown elaboration, using a light-body silicone supported by a heavy- body silicone.
•Journal Article
LAVA--the system for all-ceramic ZrO2 crown and bridge frameworks.
TL;DR: The use of an easy-to-machine presintered ceramic material allows for the first time reliable, fully-automated and thus fast manufacturing of all-ceramic restorations in the posterior region.
Randomized controlled clinical trial of zirconia-ceramic and metal-ceramic posterior fixed dental prostheses: a 3-year follow-up.
TL;DR: Test whether posterior fixed dental prostheses (FDPs) with zirconia frameworks exhibit similar survival rates and technical and biologic outcomes as those with metal frameworks found them to exhibit a similar survival rate to metal-ceramic FDPs at 3 years of function.