Related Experiment Video
Updated: Jun 7, 2026
07:42
Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
Dental ceramics and the molar crown testing ground
Van P Thompson1, Dianne E Rekow
1Department of Biomaterials and Biomimetics, University College of Dentistry.
Journal of Applied Oral Science : Revista FOB
|October 21, 2010
Summary
This study investigates ceramic crown damage modes, identifying three key failure types: cone cracking, yield, and flexural cracking. Understanding ceramic properties and thickness is crucial for predicting and preventing restoration failure in cosmetic dentistry.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Ceramic Engineering
Background:
- All ceramic crowns are increasingly popular for esthetic and life-like dental restorations.
- Understanding ceramic microstructure and damage modes is essential for improving dental restoration longevity.
- Previous research has focused on identifying failure mechanisms in thin ceramic layers.
Purpose of the Study:
- To elucidate the damage modes of all ceramic dental restorations.
- To develop predictive models for ceramic failure based on material properties and thickness.
- To correlate laboratory findings with long-term clinical observations.
Main Methods:
- Investigated ceramic layers (0.5-2 mm thickness) using point contacts simulating tooth cuspal loading.
- Identified three primary damage modes: Hertzian cone cracking, yield (pseudo-plastic behavior), and flexural cracking.
- Developed constitutive equations incorporating material properties to predict damage modes.
Main Results:
- Ceramic thickness, especially the supporting core in layered crowns, significantly impacts flexural cracking susceptibility.
- The flaw state of the inner crown surface and the elastic modulus of supporting structures and luting cement influence fracture.
- Established relationships between material properties, thickness, and observed damage modes.
Conclusions:
- Predictive models based on material properties and thickness can forecast ceramic damage modes in dental restorations.
- Clinical performance over 16 years aligns with theoretical predictions regarding ceramic failure.
- Recommendations for clinical practice are provided to enhance the durability of all ceramic crowns.
