Finite element analysis of non-axial versus axial loading of oral implants in the mandible of the dog
Finite element analysis of non-axial versus axial loading of oral implants in the mandible of the dog
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DOI：
10.1046/j.1365-2842.1998.00318.x
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发表时间：
1998-11-01
影响因子：
2.9
通讯作者：
Van Der Perre, G
中科院分区：
文献类型：
--
作者：
Barbier, L;Vander Sloten, J;Van Der Perre, G
通过有限元分析，模拟了动物实验中轴向和非轴向咬合载荷对口腔种植体周围骨重建现象的影响。通过在比格犬下颌骨中的两个IMZ（R）种植体上插入双侧支撑的固定部分假体和悬臂固定部分假体，引入轴向和非轴向载荷条件。早期的定量和定性组织学分析显示，两种负荷条件下的重塑反应具有统计学显著性差异。建立二维和三维模型，分析和比较von Mises等效应力，最大主应力，最大主应变和应变能密度分布，首先围绕一个独立的种植体，随后围绕两个假体设计的种植体在各自的合成体内负荷。观察到周围骨组织中计算的应力分布与比较动物模型中的重塑现象之间的强相关性。可以得出结论，最高的骨重塑事件与最高等效应力的区域相吻合，轴向和非轴向载荷之间的主要重塑差异在很大程度上取决于所产生应力的水平应力分量。
The influence of axial and non-axial occlusal loads on the bone remodelling phenomena around oral implants in an animal experiment is simulated in a finite element analysis. The axial and non-axial loading conditions were introduced by inserting a bilaterally supported fixed partial prosthesis and a cantilever fixed partial prosthesis on two IMZ(R) implants in the mandible of beagle dogs. Earlier quantitative and qualitative histological analyses revealed a statistically significant different remodelling response between both loading conditions. Two-dimensional and three-dimensional models are built to analyse and compare von Mises equivalent stress, maximum principal stress, maximum principal strain and strain energy density distributions, first around a free-standing implant and subsequently around the implants of the two prosthesis designs under the respective resultant in vivo loads. Strong correlations between the calculated stress distributions in the surrounding bone tissue and the remodelling phenomena in the comparative animal model are observed. It is concluded that the highest bone remodelling events coincide with the regions of highest equivalent stress and that the major remodelling differences between axial and non-axial loading are largely determined by the horizontal stress component of the engendered stresses.