Shunde Graduate School, University of Science and Technology Beijing, Foshan 528399, China.
National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing, Institute of Engineering Technology, University of Science and Technology Beijing, Beijing 100083, China.
Int J Mol Sci. 2022 Sep 3;23(17):10090. doi: 10.3390/ijms231710090.
The metal titanium is often used as a dental implant material, and the elastic modulus of solid titanium implants does not match the biological bone tissue, which can easily produce a stress shielding effect and cause implant failure. In this paper, a three-level gradient porous structure implant was designed, and its mechanical and biological adaptability were studied by finite element simulation analysis. Combined with the comprehensive evaluation of the mechanical and biological properties of implants of various structures, the analysis found that a porous implant with porosity of 59.86% of the gradient was the best structure. The maximum equivalent stress of this structure in the mandible that simulated the oral environment was 154.34 MPa, which was less than half of its theoretical compression yield strength. The strain of the surrounding bone tissue lies in the bone compared with other structures, the proportion of the active state of plastic construction is larger, at 10.51%, and the fretting value of this structure and the bone tissue interface is the smallest, at only 10 μm.
金属钛常用于牙科植入物材料，而实心钛植入物的弹性模量与生物骨组织不匹配，这容易产生应力屏蔽效应并导致植入物失效。本文设计了一种三级梯度多孔结构植入物，并通过有限元模拟分析研究了其机械和生物适应性。通过对各种结构植入物的机械和生物性能的综合评价，分析发现，多孔梯度孔隙率为 59.86%的多孔植入物是最佳结构。在模拟口腔环境的下颌骨中，这种结构的最大等效应力为 154.34MPa，不到其理论压缩屈服强度的一半。周围骨组织的应变与其他结构相比，处于活跃状态的塑性构建的比例更大，为 10.51%，并且这种结构与骨组织界面的微动值最小，仅为 10μm。
