下颌骨形态对种植体-骨界面应力分布影响的研究

目的　模拟单个下颌磨牙缺失的种植修复 ,分析不同下颌骨形态对种植体 骨界面应力分布的影响。方法　采用三维有限元法 ,根据下颌骨测量资料建立不同颌骨截面形态的种植修复模型并进行分析。结果　不论垂直载荷或斜向载荷 ,不同颌骨形态模型骨界面应力分布规律及应力值差异均无显著性。其中Von Mises应力最大差异为 6 4% ,压应力最大差异为 2 8% ,拉应力最大差异为 6 2 %。结论　在有限元研究中将下颌骨形态简化为规则形态是合理的

Effect of jaw shape on stresses at implant-bone interface:a three-dimensional finite element analysis

Objective To study the influence of different shape of lower jaw on stress distribution at bone interface in the mandibular molar region of implant restoration models. Methods Six models with different lower jaw shapes were constructed by using three dimensional finite element method. Implant bone interface stresses in these models were studied under vertical and lateral loads. Results No matter in the condition of vertical loading of lateral loading, stress distribution patterns were similar in variant models and differences of stress values were not statistically significant. The maximal differences in Von Mises stress, compressive stress and tensile stress among the six models were 6.4%, 2.8% and 6.2%respectively. Conclusion It is rational to simplify the lower jaw shape in finite element analysis.