基于有限元分区式多孔种植体设计研究

目的:根据现有普通种植体的几何参数,设计分区式多孔结构种植体进行拓扑优化,并通过有限元方法分析有无多孔、不同孔形以及不同位置的种植体在下颌骨模型中的应力分布,比较其优劣势。方法:通过“六维齿科牙种植设计软件”确定几何参数并UG建模;在有限元软件中模拟咬合力加载,分析4种种植体在最大力、适合力下的应力分布。结果:4种不同种植体的应力分布有较大差异,正菱形交错排布多孔种植体应力分布明显小于其它3组。结论:对于种植体修复,合适的多孔结构种植体在力学性能上比现有的普通实心种植体更具优势。

Design of Sectional Porous Dental Implant Based on Finite Element Analysis

Objective: To determine the geometric parameters of sectional structure of porous implants based on statistical analysis of ordinary implant, and to compare the advantage of porous implant with different pore shape, pore size and location to the solid implant by finite element analysis. Methods: 6D dental implants design software was used to determine the geometric parameters by building UG models. The largest and suitable occlusal force loading was simulated in the finite element software to analyze stress distribution of four different implants in the mandible. Results: The stress distributions of four different implants in the mandible are different. The stress of diamond staggered arrangement of porous implants is significantly less than others. Conclusion: Compared to solid implant, appropriate porous structure implant is far more superior for implant restoration.