倾斜角度对种植体骨界面生物力学影响的三维有限元分析

Influence of Tilted Angle on Biomechanical Distribution on Implant-bone Interface:A Three-Dimensional Finite Element Analysis

目的 :分析不同倾斜种植对种植体界面应力、应变及位移分布状况的影响。方法 :在第一磨牙区分别垂直及向舌侧倾斜10°、20°、30°植入种植体 ,建立下颌骨三维有限元模型。模拟咀嚼肌力加载 ,分析在正中咬合情况下种植体骨界面应力、应变及位移分布情况。结果 :随着倾斜角度的增大 ,种植体骨界面应力、应变及位移均增加。倾斜30°种植时 ,种植体骨界面应力显著性增大(P<0.01)。结论 :种植体倾斜角度应小于30°。

Objective: To analyze the influence of different tilted angle on the distribution of the stress,strain and displacement on the implant_bone interface.Methods:An implant was embedded in the first molar position,which was vertical and 10°、20°、30°tilted ligually to occlusal plane respectively,to construct four three_dimensional finite element models of edentulous mandible.A simulated force of masticatory muscles was loaded in the mathematical models,analysis of the stress,strain and displacement distribution on the implant_bone interface at central occlusion.Results:There was an increase in the magntitude of stress,strain and displacement as the angle increased.When the embeded implant was angled 30°,the stress of implant_bone interface increased significentlly(P<0.01).Conclusion:The tilted angle of implants should be less than 30°.