天然牙—牙种植体联合桥基牙应力分布及位移研究

目的：研究天然牙一种植体联合支持固定桥基牙的应力分布和位移的规律，方法：采用三维有限元的方法研究天然牙一种植体受力和运动的特点，结果：集中斜向力种植体最大应力值是集中垂直向力的2倍，是集中斜向力下天然牙最大应力值的3倍，天然牙一种植体联合支持固定桥中天然牙比值植体的位移大，种植体承担外力较大，结论：天然牙一种植体联合支持固定枯是不同于传统的固定桥的修复体，颊舌向力是修复体破坏的最主要因素。临床应用时应注意选用有一定程度的种植体，减轻He力，减少夹舌向力。

Stress distribution and displacement of natural teeth-implant supported fixed bridge

Objective To study stress distribution and displacement of natural tooth-fimplant supported fixed bridge.Methods The 3-dimensional finite,was used.Results The stress on abutments under the oblique loading was larger than that under the vertical loading;the stress on fixture was bigger than that on tooth.The displacement of tooth was biggr than fixture.Conclusion The concentrated oblique loading is the main force for distructing the natural tooth-fixture supported fixed bridge.In clinic,the stronger fixture should be selected,and occlusal force,especialy oblique force should be reduced.