Related Experiment Video
Updated: Apr 28, 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
953
Microstructure-Dependent Rotational Wear of Dental Glass-Ceramics Under Low Humidity
Estíbaliz Sánchez-González1, Fernando Rodríguez-Rojas2, Oscar Borrero-López1
1Departamento de Ingeniería Mecánica, Energética y de los Materiales, Universidad de Extremadura, 06006 Badajoz, Spain.
Journal of Functional Biomaterials
|April 27, 2026
Summary
Rotational wear testing revealed significant damage in dental glass-ceramics. Lithium disilicate showed superior resistance compared to leucite, highlighting microstructure
Area of Science:
- Biomaterials Science
- Dental Materials
- Tribology
Background:
- Dental prostheses face wear, especially with parafunctional habits like bruxism.
- Cyclic rotational loading is clinically relevant but understudied in vitro.
- Glass-ceramics are common dental materials requiring wear resistance evaluation.
Purpose of the Study:
- To investigate the wear resistance of commercial glass-ceramics under rotational loading.
- To understand wear mechanisms and microstructure-dependent variations.
- To inform material selection for improved prosthetic durability.
Main Methods:
- Utilized an all-electric testing machine with a biaxial actuator for rotational loading.
- Applied cyclic loading: 50 N normal load, 30° rotation at 1 Hz.
- Characterized microstructure and damage using advanced microscopy.
Main Results:
- Rotational loading caused substantial damage and formed poorly protective tribolayers.
- Three of five materials exhibited severe wear rates (SWR > 10⁻⁶ mm³/N·m).
- Lithium disilicate resisted damage best; leucite-based materials showed the least resistance.
Conclusions:
- Rotational loading reveals significant wear vulnerabilities in dental glass-ceramics.
- Material microstructure, particularly crystal morphology, dictates wear resistance.
- Findings guide material design for enhanced durability in dental prosthetics.
