Guoqing Zhang, Junxin Li, Chengguang Zhang, Juanjuan Xie, Xiaoyu Zhou, Anmin Wang
School of Mechanical and Electrical Engineering, Zhoukou Normal University, Henan, Zhoukou, 466000, PR China.
School of Mechanical and Electrical Engineering, Zhoukou Normal University, Henan, Zhoukou, 466000, PR China.
J Mech Behav Biomed Mater. 2021 May;117:104415. doi: 10.1016/j.jmbbm.2021.104415. Epub 2021 Feb 24.
To obtain high performance (matching, mechanical properties, and biocompatibility) of personalized biomechanical fixation-type tibial implants, three-dimensional reconstruction was performed using a combination of reverse and positive methods. The implant design was optimized using a topological optimization method, the shape-optimized B-unit structure was filled, and the performance was evaluated for implants prepared by direct forming technology of Selective Laser Melting (3D Printing). The results show obviously reduced weight of the tibial implant, increased stress and displacement, yet with a more uniform distribution. The mechanical properties of the tibial implant were lower than those of the B-units, the weight was lighter, and the stress distribution was more uniform. The surface of the tibial implants prepared by SLM appeared clean and bright, the metal texture was good, the structure between the porous struts was clear, the surface had low powder adhesion, the lap joint was good, and no obvious warping deformation or forming defects were observed. The results of this study provide a foundation for the direct application of high performance personalized biofixation implants.
为了获得个性化生物力学固定型胫骨植入物的高性能（匹配性、机械性能和生物相容性），采用逆向和正向方法相结合的方式进行三维重建。使用拓扑优化方法对植入物设计进行优化，对形状优化后的B单元结构进行填充，并对通过选择性激光熔化直接成型技术（3D打印）制备的植入物的性能进行评估。结果表明，胫骨植入物的重量明显减轻，应力和位移增加，但分布更加均匀。胫骨植入物的机械性能低于B单元，重量更轻，应力分布更均匀。通过选择性激光熔化制备的胫骨植入物表面干净明亮，金属质感良好，多孔支柱之间的结构清晰，表面粉末附着力低，搭接良好，未观察到明显的翘曲变形或成型缺陷。本研究结果为高性能个性化生物固定植入物的直接应用提供了基础。
