基于Zimmer品牌两段式种植体的有限元分析

The Finite Element Analysis of Two Segment Dental Implant Based on Zimmer Brand

采用有限元分析法探讨了两段式种植体在下颌骨实体模型中受咀嚼力的生物力学特性.使用Mimics软件对下颌骨(无牙列)CBCT图像进行逆向建模,对建立的三维实体模型应用Geomagic软件进行优化;使用SolidWorks建立两段式种植体三维实体模型;利用Hypermesh软件对有限元模型设置材料属性、划分网格、定义约束和接触、施加载荷;在Abaqus软件中分析两段式种植体在两种不同咬合力作用下的应力分布,探究了两段式种植体的生物力学特性.研究结果表明,两段式种植体在咀嚼力的作用下具有良好的力学特性,但种植体顶部受力过大,建议加强此处的材料强度,并在结构上进行优化.

The biomechanical properties of the two-stage dental implant in the mandible model were studied by using the finite element method.Using CBCT images and Mimics,a reverse modeling software,a three-dimensional solid model of mandible(edentulous)with high geometric similarity was built,and using Geomagic software to optimize the model.Using SolidWorks to build a 3D solid model of two-stage dental implant.Using Hypermesh software to set material properties,mesh,define constraints and contact,and apply loads to the finite element model.The stress distribution of the two-stage implant under two different bite forces was analyzed in Abaqus software,to explore the biomechanical characteristics of two-stage dental implant.The results show that the two-stage implant has good mechanical properties under the effect of chewing force,but the force on the top of the implant is too large.It is suggested to strengthen the material strength and optimize the structure.