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Related Experiment Video

Updated: Jul 7, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Published on: December 20, 2024

Interface dimensions of CEREC-3 MOD onlays.

Wendy C Wang¹, Ailbhe McDonald, Aviva Petrie

¹Department of Conservative Dentistry, Eastman Dental Institute, London, UK. wwang@vachiramon.org

The European Journal of Prosthodontics and Restorative Dentistry

|February 2, 2008

Summary

Ceramic onlays made with the CEREC 3 system showed a significantly larger cement space than those made with feldspathic porcelain. This difference may be due to the CEREC system

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Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

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Published on: December 20, 2024

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Published on: May 24, 2022

Area of Science:

Dental Materials Science
Digital Dentistry
Prosthodontics

Background:

The CEREC 3 system offers chairside fabrication of ceramic restorations.
Accurate fit and minimal cement space are crucial for restoration longevity.

Purpose of the Study:

To compare the interface dimensions of CEREC 3 ceramic onlays with laboratory-fabricated feldspathic porcelain onlays.
To evaluate the cement lute space in ceramic onlays produced by different methods.

Main Methods:

Fabrication of 20 CEREC 3 ceramic onlays and 20 feldspathic porcelain onlays on a master die.
Production of 80 cement analogues using elastomeric impression material.
Orthogonal sectioning of analogues and measurement of interface dimensions using Image Analysis Software.

Main Results:

CEREC 3 ceramic onlays exhibited significantly larger cement lute space (201.3 ± 78.0 µm) compared to feldspathic porcelain onlays (139.7 ± 49.7 µm).
Increased interface dimensions were particularly observed in the proximal box areas of CEREC 3 onlays.
Statistical analysis showed a significant difference (P < 0.001) between the two fabrication methods.

Conclusions:

CEREC 3 ceramic onlays demonstrate a larger cement space than conventional feldspathic porcelain onlays.
Factors such as fabrication variables and onlay design complexity may contribute to the increased cement space in CEREC restorations.
Further research is needed to optimize CEREC 3 fabrication for improved marginal fit.