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Verification of a computer-aided replica technique for evaluating prosthesis adaptation using statistical agreement
Hang-Nga Mai1, Kyeong Eun Lee2, Kyu-Bok Lee3
1Department of Prosthodontics, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea; and Department of Prosthodontics, National Hospital of Odonto-Stomatology, Hanoi, Vietnam.
The Journal of Advanced Prosthodontics
|November 17, 2017
Summary
The computer-aided replica technique (CART) reliably measures the fit accuracy of dental prostheses. This digital method shows strong agreement with the traditional replica technique (RT) for evaluating marginal and occlusal gaps.
Area of Science:
- Dental Materials Science
- Biomaterials
- Prosthodontics
Background:
- Accurate fit of fixed dental prostheses is crucial for long-term success.
- Traditional methods for evaluating prosthesis fit can be time-consuming and subjective.
- Digital technologies offer potential improvements in precision and efficiency.
Purpose of the Study:
- To assess the reliability of the computer-aided replica technique (CART).
- To compare CART measurements with the conventional replica technique (RT).
- To statistically analyze the agreement between these two measurement methods.
Main Methods:
- Fabricated metal dies and crowns, replicating gaps with silicone indicator paste (n=25).
- Measured marginal and occlusal gaps using microscopy (RT) and optical scanning/software analysis (CART).
- Evaluated agreement using Bland-Altman limits and concordance correlation coefficients (CCC), with a minimum acceptable CCC of 0.90.
Main Results:
- Strong positive correlation observed between RT and CART gap measurements.
- No significant differences were found between the two techniques.
- CCC values exceeded the 0.90 threshold (0.9676 for marginal, 0.9188 for occlusal gaps).
Conclusions:
- The computer-aided replica technique (CART) demonstrates high reliability.
- CART is a dependable digital approach for assessing the fit accuracy of fixed dental prostheses.
- This digital method offers a precise alternative to traditional techniques.
