IPS-Empress2玻璃陶瓷弯曲强度的测试及意义  

Statistical significance of flexural strength of IPS-Empress2 glass-ceramics

作　　者：张志升[1] 苏剑生[1] 姚江武 刘伟才[1] 

机构地区：[1]同济大学口腔医学院修复科,上海200072 [2]厦门市口腔医院

出　　处：《临床口腔医学杂志》2006年第8期469-470,共2页Journal of Clinical Stomatology

摘　　要：目的:研究IPS-Empress2玻璃陶瓷弯曲强度的统计意义。方法:采用三点弯曲强度测量方法测量40个IPS-Empress2玻璃陶瓷的弯曲强度并与Weibull分析方法相结合,求该陶瓷的Weibull模数(m)及其强度与生存概率的对应关系。结果:IPS-Empress2玻璃陶瓷Weibull模数为7.7。其1%、5%、63.21%破坏概率的弯曲强度分别为301.5 MPa3、19.2 MPa4、21.1 MPa。结论:IPS-Empress2玻璃陶瓷具有低的Weibull模数以及欠佳的材料结构可靠性,所以其在高应力受力区破坏的概率大。采用弯曲强度测试法并结合使用Weibull分析方法能加深对口腔陶瓷修复失败机制的理解。Objective： To study the statistical Significance of flexural strength of IPS-Empress 2 Glass-ceramics. Method：Three-point flexural test was used to measure 40 specimens＇ flexural strength. Weibull value of Glass-ceramics and the relationship between flexural strength and survival probability was Investigated. Result： The Weibull value of Glass-ceramies was 7.7. and 1% ,5%, 63.21% fractural probabilities of Glass-ceramics was 301.5MPa, 319.2MPa and 421.1MPa respectively. Conclusion：The strength of the brittle ceramics show a statistical tendency of distribution and has low Weibull value . only strength values should not be evaluated on the structural reliability correctly , So Weibull analysis can be used as a design parameter of brittle ceramic for clinical practice which will introduce a well-understanding of the tested values.

关 键 词：热压铸造陶瓷 Weibull分析 弯曲强度 

分 类 号：R783.1[医药卫生—口腔医学]