Evaluation of marginal discrepancy of pressable ceramic veneer fabricated using CAD/CAM system: Additive and subtractive manufacturing
10.4047/jap.2018.10.5.347
- Author:
Seen Young KANG
1
;
Ha Na LEE
;
Ji Hwan KIM
;
Woong Chul KIM
Author Information
1. Department of Dental Laboratory Science and Engineering, College of Health Science, Korea University, Seoul, Republic of Korea. kuc2842@korea.ac.kr
- Publication Type:Original Article
- Keywords:
Additive manufacturing;
Subtractive manufacturing;
Computer-aided design and computer-aided machining (CAD/CAM);
Ceramic veneer;
Heat pressing
- MeSH:
Ceramics;
Incisor;
Methods;
Silicon;
Silicones
- From:The Journal of Advanced Prosthodontics
2018;10(5):347-353
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: The purpose of this study was to evaluate the marginal discrepancy of heat-pressed ceramic veneers manufactured using a CAD/CAM system. MATERIALS AND METHODS: The ceramic veneers for the abutment of a maxillary left central incisor were designed using a CAD/CAM software program. Ten veneers using a micro-stereolithography apparatus (AM group), ten veneers using a five-axis milling machine (SM group), and ten veneers using a traditional free-hand wax technique (TW group) were prepared according to the respective manufacturing method. The ceramic veneers were also fabricated using a heat-press technique, and a silicone replica was used to measure their marginal discrepancy. The marginal discrepancies were measured using a digital microscope (×160 magnification). The data were analyzed using a nonparametric Kruskal-Wallis H test. Finally, post-hoc comparisons were conducted using Bonferroni-corrected Mann-Whitney U tests (α=.05). RESULTS: The mean±SD of the total marginal discrepancy was 99.68±28.01 µm for the AM group, 76.60±28.76 µm for the SM group, and 83.08±39.74 µm for the TW group. There were significant differences in the total marginal discrepancies of the ceramic veneers (P < .05). CONCLUSION: The SM group showed a better fit than the AM and TW groups. However, all values were within the clinical tolerance. Therefore, CAD/CAM manufacturing methods can replace the traditional free-hand wax technique.
