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微种植体舌侧内收上前牙力系三维有限元非线性模型的建立

, PP. 1652-1656

Keywords: 非线性,三维有限元,舌侧内收力系,微种植体支抗

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Abstract:

目的建立具有高度几何相似性和力学相似性的微种植体支抗舌侧内收上颌前牙力系的三维有限元非线性模型。方法通过高精度的螺旋CT扫描获得组牙与颌骨的结构信息,运用MIMICS软件进行三维重建,在Solidworks软件中建立包含舌侧托槽、弓丝、牵引钩及微种植体的三维几何模型。将上述三维几何模型导入ANSYS软件,并生成非线性牙周膜及非均质性颌骨,最终生成微种植体支抗舌侧内收上颌前牙力系的三维有限元非线性模型,并对模型进行加载检测。结果成功建立了高仿真的微种植体舌侧内收上颌前牙力系的三维有限元非线性模型。在100×g内收载荷作用下,上颌前牙发生舌向倾斜的初始位移,同时上颌切牙的腭侧龈缘与颊侧根尖出现压应力集中区,而腭侧根尖与颊侧龈缘出现牵张应力区。结论根据上颌骨正交各向异性以及牙周膜非线性的材料属性,建立了具有高度几何相似性和力学相似性的微种植体舌侧内收上颌前牙力系的三维有限元非线性模型,可用于该舌侧矫治力系的生物力学分析。

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