Verification of a computer-aided replica technique for evaluating prosthesis adaptation using statistical agreement analysis.
- Author:
Hang Nga MAI
1
,
2
;
Kyeong Eun LEE
;
Kyu Bok LEE
;
Seung Mi JEONG
;
Seok Jae LEE
;
Cheong Hee LEE
;
Seo Young AN
;
Du Hyeong LEE
Author Information
- Publication Type:Original Article
- Keywords: Computer-aided replica technique; Concordance correlation coefficient analysis; Prosthesis adaptation; Reliability; Verification; Silicone replica technique
- MeSH: Crowns; Dental Prosthesis; Prostheses and Implants*; Replica Techniques*; Silicon; Silicones
- From:The Journal of Advanced Prosthodontics 2017;9(5):358-363
- CountryRepublic of Korea
- Language:English
- Abstract: PURPOSE: The purpose of this study was to evaluate the reliability of computer-aided replica technique (CART) by calculating its agreement with the replica technique (RT), using statistical agreement analysis. MATERIALS AND METHODS: A prepared metal die and a metal crown were fabricated. The gap between the restoration and abutment was replicated using silicone indicator paste (n = 25). Gap measurements differed in the control (RT) and experimental (CART) groups. In the RT group, the silicone replica was manually sectioned, and the marginal and occlusal gaps were measured using a microscope. In the CART group, the gap was digitized using optical scanning and image superimposition, and the gaps were measured using a software program. The agreement between the measurement techniques was evaluated by using the 95% Bland-Altman limits of agreement and concordance correlation coefficients (CCC). The least acceptable CCC was 0.90. RESULTS: The RT and CART groups showed linear association, with a strong positive correlation in gap measurements, but without significant differences. The 95% limits of agreement between the paired gap measurements were 3.84% and 7.08% of the mean. The lower 95% confidence limits of CCC were 0.9676 and 0.9188 for the marginal and occlusal gap measurements, respectively, and the values were greater than the allowed limit. CONCLUSION: The CART is a reliable digital approach for evaluating the fit accuracy of fixed dental prostheses.
