Barbier L, Vander Sloten J, Krzesinski G, Schepers E, Van der Perre G
Department of Prosthetic Dentistry, Biomat, Catholic University of Leuven, Belgium.
J Oral Rehabil. 1998 Nov;25(11):847-58. doi: 10.1046/j.1365-2842.1998.00318.x.
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 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.
在一项动物实验中，通过有限元分析模拟了轴向和非轴向咬合负荷对口腔种植体周围骨重塑现象的影响。通过在比格犬下颌的两颗IMZ种植体上分别植入双侧支持的固定局部义齿和悬臂固定局部义齿来引入轴向和非轴向加载条件。早期的定量和定性组织学分析显示，两种加载条件下的骨重塑反应在统计学上有显著差异。建立二维和三维模型，以分析和比较冯·米塞斯等效应力、最大主应力、最大主应变和应变能密度分布，首先是在独立种植体周围，然后是在两种义齿设计的种植体周围，在各自的体内合力作用下。观察到周围骨组织中计算出的应力分布与比较动物模型中的重塑现象之间有很强的相关性。得出的结论是，最高的骨重塑事件与等效应力最高的区域一致，轴向和非轴向加载之间的主要重塑差异在很大程度上由所产生应力的水平应力分量决定。
