Fracture Toughness of Veneering Ceramics for Fused to Metal (PFM) and Zirconia Dental Restorative Materials.

Fracture Toughness of Veneering Ceramics for Fused to Metal (PFM) and Zirconia Dental Restorative Materials.
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DOI:
10.6028/jres.115.024
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发表时间:
2010-09
影响因子:
1.5
通讯作者:
Sundar V
Sundar V
中科院分区:
工程技术4区
文献类型:
--
作者:
Quinn JB;Quinn GD;Sundar V

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据报道,设计用于现代氧化锆框架修复体的饰面陶瓷偶尔会在体内破裂。测量了这种饰面陶瓷的断裂韧性,并与用于金属框架修复的传统长石瓷饰面陶瓷的断裂韧性进行了比较。测得无白榴石贴面的断裂韧性为 0.73 MPa·m ± 0.02 MPa·m,小于熔附金属 (PFM) 贴面陶瓷的断裂韧性:1.10 MPa ± 0.2 MPa。 (除非另有说明,不确定度为一个标准偏差。)弯曲表面裂纹 (SCF) 方法适用于这两种材料,但对于含有白榴石的长石瓷 PFM 贴面,预裂纹识别很困难。
Veneering ceramics designed to be used with modern zirconia framework restorations have been reported to fracture occasionally in vivo. The fracture toughness of such veneering ceramics was measured and compared to that of conventional feldspathic porcelain veneering ceramics for metal framework restorations. The fracture toughness of the leucite free veneer was measured to be 0.73 MPa m ± 0.02 MPa m, which is less than that for the porcelain fused to metal (PFM) veneering ceramic: 1.10 MPa ± 0.2 MPa. (Uncertainties are one standard deviation unless otherwise noted.) The surface crack in flexure (SCF) method was suitable for both materials, but precrack identification was difficult for the leucite containing feldspathic porcelain PFM veneer.
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