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Micro-Computed Tomography Analysis of Fit of Ceramic Inlays Produced with Different CAD Software Programs.
1Ankara University, Faculty of Dentistry, Department of Prosthodontics, Ankara, Turkey.
The European Journal of Prosthodontics and Restorative Dentistry
|January 4, 2021
Summary
Different computer-aided design (CAD) software programs significantly impact the marginal and internal fit of ceramic inlay restorations. This study evaluated fit differences across three CAD systems, revealing variations in specific measurement points.
Area of Science:
- Dental Materials Science
- Digital Dentistry
- Prosthodontics
Background:
- Computer-aided design (CAD) and computer-aided manufacturing (CAM) technologies are increasingly utilized in fabricating dental restorations.
- The precision of digital design software is crucial for achieving optimal fit of indirect restorations, such as ceramic inlays.
- Variations in CAD software algorithms may influence the accuracy of digital models and subsequent restoration fit.
Purpose of the Study:
- To evaluate and compare the marginal and internal fit of ceramic inlays fabricated using different CAD software programs.
- To determine if variations in CAD software design influence the precision of feldspathic ceramic inlay restorations.
Main Methods:
- Eleven typodont mandibular first molars were prepared for ceramic class II mesio-occlusal inlay cavities.
- Teeth were scanned using a 3Shape TRIOS Intraoral Dental Scanner, and STL files were used for design in three CAD systems (CEREC, KaVo, Planmeca).
- Feldspathic ceramic inlays were manufactured using a 5-axis milling unit, and marginal/internal fit was assessed using micro-CT with 11 measurements per tooth.
Main Results:
- A statistically significant difference was observed between the CAD software groups for specific measurement variables (A, D, F) based on repeated ANOVA tests.
- No statistically significant differences were found in other linear and volumetric measurements across the evaluated CAD systems (p > 0.05).
- These findings suggest that while some aspects of fit are consistent, specific geometric parameters are influenced by the CAD software used.
Conclusions:
- Different CAD software systems demonstrably affect the marginal and internal fit of ceramic inlay restorations.
- The choice of CAD software can be a critical factor influencing the precision and clinical success of digital dental prosthetics.
- Further research is warranted to explore the specific algorithmic differences in CAD software that contribute to variations in restoration fit.
