两种牙科切削陶瓷材料可切削性的比较  

Comparison of machinability of two types of dental machinable ceramic

作　　者：付强[1] 李彦[1] 林雪峰[1] 赵云凤[2] 李勇[2] 范新平[2] 

机构地区：[1]中山大学光华口腔医学院修复科,广州510060 [2]四川大学华西口腔医学院修复科

出　　处：《中华口腔医学杂志》2002年第6期438-441,共4页Chinese Journal of Stomatology

基　　金：国家自然科学基金 ( 39970 799);广东省自然科学基金 ( 0 10 755)资助项目

摘　　要：目的　对作者研制的一种新型含钙云母玻璃陶瓷PMC Ⅰ型陶瓷的可切削性能与VitaMKⅡ陶瓷进行定量比较 ,探讨PMC Ⅰ型陶瓷强度与其可切削性的关系。方法　采用钻孔实验方法 ,测定A、B、C、D4组不同晶化处理的PMC Ⅰ型陶瓷及VitaMKⅡ陶瓷材料 60 0s的钻孔深度 ,同时测定4组PMC Ⅰ型陶瓷的 3点抗弯强度。结果　VitaMKⅡ的钻孔深度为 0 71mm ;4组PMC Ⅰ型陶瓷的钻孔深度分别为 0 88mm、1 40mm、0 40mm和 0 90mm。其中 ,B组样品与其余组别及VitaMKⅡ陶瓷的差异有显著性 (P <0 0 5)。 4组PMC Ⅰ型陶瓷的 3点抗弯强度分别为 1 37 7、2 1 0 2、1 1 8 0和 1 0 6 0MPa。结论　新型PMCObjective In terms of the problems of now available dental machinable ceramics, a new type of calcium mica glass ceramic, PMC Ⅰ ceramic, was developed, and its machinability was compared with that of Vita MKII quantitatively. Moreover, the relationship between the strength and the machinability of PMC Ⅰ ceramic was studied. Methods Samples of PMC Ⅰ ceramic were divided into four groups according to their nucleation procedures. 600 seconds drilling tests were conducted with high speed steel tools(Φ=2 3 mm) to measure the drilling depths of Vita MKII ceramic and PMC Ⅰ ceramic, while constant drilling speed of 600 rpm and constant axial load of 39 2 N were used. And the 3 point bending strength of the four groups of PMC Ⅰ ceramic were recorded.Results Drilling depth of Vita MKII was 0 71 mm, while the depths of the four groups of PMC Ⅰ ceramic were 0 88 mm?1 40 mm?0.40 mm and 0 90 mm, respectively. Group B of PMC Ⅰ ceramic showed the largest depth of 1 40 mm and was statistically different from other groups and Vita MKII. And the strength of the four groups of PMC Ⅰ ceramic were 137 7?210 2?118 0 and 106 0 MPa, respectively.Conclusion The machinability of the new developed dental machinable ceramic of PMC Ⅰ could meet the need of the clinic.

关 键 词：PMC-I型陶瓷 可切削性 强度 含钙云母玻璃陶瓷 口腔修复 对比分析 VitaMKⅡ陶瓷 

分 类 号：R783.1[医药卫生—口腔医学]