Effect of Post-Processing Heat Treatment on Micro-Contact Damage of Zirconia-Reinforced Lithium Silicate Dental Materials
Abstract
:1. Introduction
2. Experimental Procedure
2.1. Materials Processing
2.2. Microstructural Characterization
2.3. Mechanical Characterization
2.4. Stress Simulations
3. Results and Discussion
3.1. Microstructure
3.2. Mechanical Properties
3.3. Contact Damage
3.4. Resistance to Sliding Fracture
3.5. General Discussion
3.6. Implications and Future Studies
4. Conclusions
- The heat treatment does not significantly alter the crystallinity of the ZLS glass-ceramics, but it does reduce the frequency and size of processing flaws compared to the untreated material.
- Within experimental errors, the heat treatment does not impact the elastic modulus, hardness, and indentation fracture toughness of the materials.
- The heat treatment leads to an increase in critical loads for fracture and chipping in both axial and sliding contacts, with critical loads decreasing as the contact size decreases.
- A significant improvement in fracture strength, as measured from scratch tests, is observed with statistical (Weibull) significance following the heat treatment.
- The enhanced resistance to contact damage can be attributed to the refinement of the flaw population achieved through the heat treatment.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Pérez, J.A.; Rodríguez-Rojas, F.; Borrero-López, Ó.; Sánchez-González, E. Effect of Post-Processing Heat Treatment on Micro-Contact Damage of Zirconia-Reinforced Lithium Silicate Dental Materials. Materials 2024, 17, 1961. https://doi.org/10.3390/ma17091961
Pérez JA, Rodríguez-Rojas F, Borrero-López Ó, Sánchez-González E. Effect of Post-Processing Heat Treatment on Micro-Contact Damage of Zirconia-Reinforced Lithium Silicate Dental Materials. Materials. 2024; 17(9):1961. https://doi.org/10.3390/ma17091961
Chicago/Turabian StylePérez, José A., Fernando Rodríguez-Rojas, Óscar Borrero-López, and Estíbaliz Sánchez-González. 2024. "Effect of Post-Processing Heat Treatment on Micro-Contact Damage of Zirconia-Reinforced Lithium Silicate Dental Materials" Materials 17, no. 9: 1961. https://doi.org/10.3390/ma17091961