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Interface dimensions of CEREC-2 MOD inlays
1Department of Clinical Dental Sciences, University of Liverpool, L69 3BX, Liverpool, UK. nmartin@liverpool.ac.uk
Summary
The CEREC-2 CAD-CAM system offers improved ceramic inlay fit. Cement viscosity does not significantly impact the cement interface width, allowing for flexible material choices.
Area of Science:
- Dental materials science
- Biomaterials engineering
- Computer-aided design and manufacturing (CAD-CAM) in dentistry
Background:
- The CEREC system has revolutionized dental restorations.
- Evaluating the cement interface is crucial for restoration longevity.
- Understanding cement properties' impact on fit is essential.
Purpose of the Study:
- To quantify the cement interface width between CEREC-2 ceramic inlays and teeth.
- To assess the influence of cement viscosity on this interface width.
Main Methods:
- Standardized MOD cavities prepared in human premolars.
- CEREC-2 CAD-CAM system used for ceramic inlay fabrication.
- Inlays cemented with three resin-based composites of varying viscosity.
- Sectioning of teeth and microscopic analysis of the cement interface.
Main Results:
- The occlusal interface exhibits a wedge shape, narrower externally (50 µm) than internally (211 µm).
- No significant difference in interface width was found at the gingival floor.
- Cement viscosity did not statistically affect interface dimensions across the tested groups.
Conclusions:
- CEREC-2 restorations demonstrate improved marginal fit compared to earlier versions.
- Various cement viscosities are suitable for CEREC-2 inlays without compromising interface width.
- Care is needed with light-cured cements to ensure proper light penetration.