中国人胫骨平台与半月板后倾角MRI测量

Measurement and Comparision of the Posterior Slope between Tibial Plateau and Meniscus in Chinese Population

目的:测量、比较分析中国人胫骨后倾角与半月板后倾角,为人工全膝关节置换术中胫骨侧截骨提供参考。方法:对60例健康志愿者行膝关节核磁共振成像(MRI)检查,在MRI工作平台上进行操作,取冠状位内侧胫骨平台中间为测量平面,在该平面的矢状位对半月板及胫骨后倾角进行测量。结果:胫骨平台后倾角平均为9.87°±1.56°,半月板后倾角平均为0.96°±0.09°,半月板后倾角与胫骨平台后倾角有显著性差异(P<0.05)。本实验结果表明,中国人半月板的后倾角几乎为0°,并不随胫骨平台骨性结构的后倾而变化。膝关节胫、股骨关节面的最高接触面是股骨髁与半月板的接触。人工膝关节置换时进行胫骨侧切骨时可水平切骨,胫骨假体的安装亦可水平安装。

Objective To compared the posterior slop between tibial plateau and meniscus in Chinese population for determining the angle of tibial osteotomy during total knee replacement （TKA）. Methods Posterior slop of tibial plateau and meniscus in sixty Chinese volunteers were measured on sagital view of MRI image. Results The values of posterior slop of tibial plateau and meniscus were 9.87° ± 1.56°and 0.96°± 0.09°, respectively. The two angle revealed remarkable difference （P 〈 0.05 ） . Conclusion The posterior slop of meniscus was different from that of tibial plateau, there was not oblique with the posterior slop of tibial, therefore tibial osteotomy and install of tibial components can be performed vertically during TKA.