基于叶脉骨架结构的股骨柄设计方法

为提高股骨柄假体与股骨髓腔的匹配程度,通过股骨关键横切面获取股骨髓腔形态参数,选取粗隆区域为感兴趣区域并构建其叶脉骨架结构,基于叶脉骨架结构的股骨柄假体设计方法构建股骨柄模型.该方法考虑股骨柄局部感兴趣区域的二次编辑修改性,操作简单、灵活、高效,并可以解决假体模型后期修改困难的问题.有限元分析结果表明,构建的股骨柄假体具有良好的力学性能.

Design Method of Femoral Stem Based on Vein Skeleton Structure

Improving the good matching between femoral stem prosthesis and femoral medullary cavity is one of the most paramount clinical problems in joint surgery. The existing design methods of femoral stem prosthesis have not taken into account the secondary editing of the local region of interest of the femoral stem, which makes it difficult to modify the prosthesis model in the later stage. Aiming at fixing this problem, a design method of femoral stem prosthesis based on vein skeleton structure is presented in this paper; the center of femoral medullary cavity is obtained from the key cross section of femur, and the morphological parameters of femoral bone marrow cavity are measured, then the tuberosity area is selected as the region of interest and the vein skeleton structure is constructed, and finally the femoral stem model is constructed. The finite element analysis results demonstrate that the femoral stem prosthesis constructed by this method has good mechanical properties. It can be seen that this method is simple, flexible and efficient, which furnishes a new method for the design of femoral stem prosthesis and is of great significance to improve the matching between femoral stem prosthesis and femoral medullary cavity.