游离端缺失种植义齿上部结构整铸支架固位体的适合性

Experimental Study on Fitness of Retainers of One Piece Casting Frameworks of Distal Extension Implant Denture

采用三维坐标测量方法考察游离端缺失种植义齿基桩位置改变的情况下，两种非贵金属合金上部结构整铸支架固位体的适合性。结果表明：固位体的变形在三种不同种植基桩位置之间和两种合金之间均无统计学差异，但各固位体在水平向和龈向均有不同程度的变形，而且颈缘的收缩有较方大的趋势，说明较长的非贵金属合金上部结构整铸支架固位体的适合性有待改善。

An experiment on fitness of retainers of one piece casting frameworks was performed between two non noble metals and among three of abutment positions fixture implant with a coordinate measuring machine for three dimensional analysis. The results showed that there was no statistically significant differences in retainer fitness between the two metals, and among the three fixture abutment positions . However, all retainer displayed shrinkage in three dimensions, and the retainer shrinkage on the cervical surface were more than on the occlusal surface. The fitness of retainers of one piece casting frameworks would be improved if used in multi unit implant fixed denture.