【摘要】 目的 分析泰森多边形多孔结构髋臼杯与实体髋臼杯的初始稳定性差异，探究泰森多边形结构多孔层对髋臼杯初始稳定性的影响及其在预防松动脱位方面的作用。方法 通过Grasshopper设计孔隙率分别为60%、70%的泰森多边形多孔结构支架，利用选区激光熔化技术(selective laser melting, SLM)制备实体髋臼杯与孔隙率为60%、70%多孔髋臼杯样件，在相同条件的聚氨酯块模型中进行杠杆试验，分析对比3组样件的最大撬出力矩、偏转角度、界面刚度。结果 在压入力无明显差异的情况下，孔隙率为60%、70%多孔髋臼杯的最大撬出力矩分别比实体髋臼杯高278.82%、320.56%,偏转角度比实体髋臼杯高194.04%、269.23%,界面刚度比实体髋臼杯高18.58%、7.88%。杠杆试验完成后，多孔髋臼杯所用的聚氨酯块半球腔内出现明显磨损。结论 泰森多边形多孔结构髋臼杯的初始稳定性指标均高于实体髋臼杯，说明泰森多边形结构多孔层能提高髋臼杯的初始稳定性。研究结果能够为髋臼假体的设计与选型提供一定参考。更多还原

【Abstract】 Objective To analyze the differences in the initial stability of an acetabular cup with a Voronoi polyhedral porous structure and a solid acetabular cup and to explore the impact of the Voronoi polyhedral porous layer on the initial stability of the acetabular cup, as well as its role in preventing loosening and dislocation. Methods Voronoi polyhedral porous scaffold structures with 60% and 70% porosities were designed using the Grasshopper software. Specimens of porous acetabular cups with 60% and 70% porosities and solid acetabular cups were manufactured using selective laser melting technology. Lever tests on the acetabular cups were conducted using polyurethane block models under identical conditions, and the maximum lever-out moment, angular displacement, and interface stiffness of the three groups of specimens were analyzed and compared. Results Under the condition of no significant differences in the compression force, for porous acetabular cups with porosities of 60% and 70%, the maximum lever-out moment increased by 278.82% and 320.56%, the angular displacement increased by 194.04% and 269.23%, respectively, and the interface stiffness increased by 18.58% and 7.88%, respectively, compared with that of solid acetabular cups. After the lever-out tests were completed, significant wear was observed within the polyurethane block hemisphere cavity using the porous acetabular cups. Conclusions The initial stability indicators of acetabular cups with a Voronoi polyhedral porous structure were higher than those of solid acetabular cups, indicating that the Voronoi polyhedral porous layer can enhance the initial stability of the acetabular cup. These results provide a reference for designing and selecting acetabular components.更多还原