两种不同固位体设计的可摘局部义齿对牙槽骨的应力研究

A Study of Stress on Bone of Mandibular Bilateral-Distal Extension Removable Partial Dentures Which Retained by Two Different Types Retention

用三维光弹性应力分析方法，对Ｔｈｏｍｐｓｏｎ半精密附着体固位与ＲＰＩ卡环固位下颌双侧游离端可摘局部义齿在牙槽骨内的应力分布进行了研究。同时，比较了两种不同固位方法的牙槽骨内的应力分布规律。获得了基牙根尖应力。

This paper applied 3-D photoelastic stress analysis method,studied the stress distribution on bone of mandibular bilateral-distal-extension removalbe partial dentures which retained by Thompson Dowel Semi precision attachment and RPI Assembly. Nearwhile,the stress distribution on bone by two diffrent types retention was compared. The stress of abutment apical was obtained.