Effect of Post-Processing Heat Treatment on Micro-Contact Damage of Zirconia-Reinforced Lithium Silicate Dental Materials

被引:0
|
作者
Perez, Jose A. [1 ]
Rodriguez-Rojas, Fernando [1 ]
Borrero-Lopez, Oscar [1 ]
Sanchez-Gonzalez, Estibaliz [1 ]
机构
[1] Univ Extremadura, Dept Ingn Mecan Energet & Mat, Badajoz 06006, Spain
关键词
dental materials; lithium silicate; microstructure; contact damage; fracture; INDENTATION; WEAR; CERAMICS; RESISTANCE; STRENGTH; FATIGUE;
D O I
10.3390/ma17091961
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Zirconia-reinforced lithium silicate (ZLS) is utilized as a material for prosthetic tooth crowns, offering enhanced strength compared to other dental glass-ceramics. In this study, we investigate a commercial ZLS material, provided in a fully crystallized form. We examine the effects of an optional post-processing heat treatment on micro-contact damage using controlled indentation tests simulating the primary modes of contact during chewing: axial and sliding. Our findings indicate that the heat treatment does not affect mechanical properties such as the elastic modulus, hardness and indentation fracture toughness. However, it does enhance the resistance to contact damage by fracture and chipping in both axial and sliding modes, as well as the resistance to crack initiation measured from sliding tests. This improvement is attributed to the refinement of the flaw population achieved through the heat treatment. The results are analysed using principles of contact and fracture mechanics theory, discussing their significance in prosthetic dentistry.
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页数:12
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