两/三隧道固定对关节软骨及半月板的影响  

EFFECTS OF 2-TUNNEL AND 3-TUNNEL FIXATION ON BIOMECHANICS OF TIBIOFEMORAL JOINT

作　　者：黄荣瑛[1] 郭云飞[1] 张高龙[1] 郑红光[1] 卫晓东[1] 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100191

出　　处：《力学学报》2013年第2期274-282,共9页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家自然科学基金资助项目(50975013)~~

摘　　要：基于正常膝关节4个屈曲角度(0,25,60,80)下的磁共振(MR)图像数据,建立正常/两隧道固定/三隧道固定内侧半月板移植术后的胫股关节模型.对各屈曲角度下的4种模型分别施加单一轴向压载和压扭组合载荷进行有限元仿真,得到各模型在2种载荷作用下的应力及位移分布.提取关节软骨、半月板表面的等效应力以及半月板的最大位移进行对比分析,得到内侧半月板移植术后两/三隧道固定对胫股关节中软骨及半月板的影响.总体上讲内侧半月板移植中的三隧道固定要优于双隧道固定,更利于胫股关节恢复正常的应力特性.Based on MR images of normal human knee at four flexion angles（0°,25°,60°,80°）, we built 3D finite element models of the normal tibiofemoral joint and two medial meniscus transplantation models （2-tunnel fixation and 3-tunnel fixation）. Two kinds of loads （a single compressive load, the combined loads of compressive load and internal rotation torque） were applied to models in the finite element simulation, and the stress and displacement distribution were extracted from all models. We compared the von-Mises equivalent stress of articular cartilage and meniscus and the displacement of meniscus in transplantation models with those in the normal model, respectively. We concluded that the 3-tunnel fixation was superior to 2-tunnel fixation, and 3-tunnel fixation can restore the tibiofemoral joint function better.

关 键 词：内侧半月板移植 固定方法 胫股关节 有限元 接触特性 

分 类 号：R318.01[医药卫生—生物医学工程]