Bernese髋臼周围截骨术术前规划的有限元分析方法研究  

Study on Finite Element Analysis Method for the Pre-operative Planning of Bernese Periacetabular Osteotomy

作　　者：张琳琳[1] 王旭义[2] 陈晓东[2] 

机构地区：[1]上海健康医学院,上海201318 [2]上海交通大学医学院附属新华医院,上海200092

出　　处：《生物医学工程学杂志》2016年第3期455-460,共6页Journal of Biomedical Engineering

基　　金：上海市卫生局科研课题资助项目(20134002);上海医疗器械高等专科学校创新能力培育基金资助项目(SMICFD-08-15-001)

摘　　要：建立了髋关节发育不良患者的三维有限元模型,并进行了计算机模拟Bernese髋臼周围截骨术,旋转截骨块建立了不同手术方案的术后模型。分析单足站立受力环境下,术前、术后髋关节周围软骨的受力变化,并与正常髋关节模型进行比较。本文将仿真计算的正常人髋关节受力情况与文献比较,验证了模型分析方法的有效性。分析结果表明,不同手术方案对髋臼软骨的应力环境都有所改善,表现为髋臼接触面的接触应力和von Mises应力明显减小,且接触面积有所增大,但改善程度有所差异,可以通过有限元分析方法进行术前规划,为临床手术提供一定的理论依据。We developed a three-dimensional finite element model of development dysplasia of hip （DDH） of a patient. And then we performed virtual Bernese periacetabular osteotomy （PAO） by rotating the acetabular bone with different angle so as to increase femoral head coverage and distribute the contact pressure over the cartilage surface. Using finite element analysis method, we analyzed contact area, contact pressure, and von Mises stress in the acetabular cartilage to determine the effect of various rotation angle. We also built a normal hip joint model. Compared to the normal hip joint model, the DDH models showed stress concentration in the acetabular edge, and higher stress values. Compared to the DDH models, the post-PAO models showed decreases in the maximum values of yon Mises stress and contact pressure while we increased the contact area. An optimal position could be achieved for the acetabulum that maximizes the contact area while minimizing the contact pressure and von Mises stress in the acetabular cartilage. These would provide theoretical bases to pre-operative planning.

关 键 词：有限元 髋臼截骨术 髋关节发育不良 手术规划 

分 类 号：R687.3[医药卫生—骨科学]