种植义齿缓冲单元材料特性对缓冲效果的影响

Effect of material characteristics of implant denture buffer unit on stress-absorbing effect

目的：探究动态载荷作用下种植义齿缓冲单元不同的材料特性对应力吸收效果的影响。方法：在传统种植体与基台之间设计硅橡胶缓冲单元，利用abaqus有限元分析软件建立三维有限元模型，分别赋予缓冲单元材料不同弹性模量值，分析比较动态载荷作用下种植体-骨界面的应力分布。结果：缓冲材料弹性模量不同，种植体-骨界面的应力分布不同，弹性模量值在10~23MPa范围内时缓冲效果较好。结论：带有缓冲单元的新型种植体系统可减小皮质骨内的应力峰值，并且材料的弹性模量对缓冲效果有影响，在一定范围内，材料的弹性模量越小，缓冲效果越好。

Objective：To research the effects of different material properties of implant denture buffer unit on stress-absorbing effect under dynamic loading. Method： Add silicon rubber stress-absorbing elements between implant and abutment, and then three-dimensional finite element model is established by using the ABAQUS finite element analysis software. The buffer layer material value of elastic modulus of each model is different. Analysis and compare the stress around the implant under dynamic loading. Results：Given buffer materials with different elastic modulus, the stress peak values of alveolar bone are different. The cushioning effect is better when the elastic modulus in the range of 10~23MPa. Conclusion： New type implant system with stress-absorbing unit can effectively reduce the peak stress of cortical bone. And the elastic modulus of materials affected the buffering effect, in a certain range, the elastic modulus of materials should be smaller, better stress-absorbing effect.