自制IPS-Empress2铸瓷快速包埋材料物理机械性能表征  

Characterization of Homemade Fast Investment Material for the IPS-Empress2 Castable Ceramic

作　　者：贺刚 岑远坤[2] 盛祖立 

机构地区：[1]杭州哼哈口腔医院,杭州310013 [2]四川大学华西口腔医学院,成都610041

出　　处：《生物医学工程学杂志》2008年第3期600-603,共4页Journal of Biomedical Engineering

基　　金：卫生部科学基金资助项目(92-2-201)

摘　　要：为降低IPS-Empress2铸瓷修复成本,研制了国产化包埋材料,以取代昂贵的进口专用包埋材料。对自制包埋材料的物理机械性能进行表征,与进口材料进行比较和统计分析,并用扫描电镜观察两种材料表面形貌的异同点。结果显示:自制包埋材料的凝固时间为9min,烧结前密度为1·813g/cm3,烧结后密度为1·402g/cm3,开口孔隙率38·1%,凝固2h后抗压强度和烧结后抗压强度分别为5·42MPa和8·37MPa,且耐火度在1000℃以上,高于铸造温度(920℃)。与进口材料相比,自制包埋材料凝固时间更短,烧结前密度、凝固2h后抗压强度和烧结后抗压强度更高;开口孔隙率、烧结后密度和耐火度无统计学差异。扫描电镜观察显示两种材料结构相似,但自制材料的晶体尺寸略小于进口材料。可见自制包埋材料的主要物理机械性能指标接近或优于进口专用包埋材料,具有良好的临床应用前景。The aim of this study is to evaluate the physical and mechanical properties of our homemade investment material for the IPS-Empress2 castable ceramic. The IPS specific investment material was taken as control. Results show that the setting time, density before heating, density after heating, rate of open hole, compressive strength at 2 hours after setting and the compressive strength after heating to 920℃ of the homemade investment material are 9 minutes, 1.813 g/cm3, 1.402 g/cm3, 38.1%, 5.42 MPa and 8.37 M...

关 键 词：铸造陶瓷 包埋材料 开口孔隙率 抗压强度 

分 类 号：R318.08[医药卫生—生物医学工程]