股骨髁旋转力线在三维重建图像中的测量

目的：比较正常膝关节CT三维重建图像中股骨上髁轴（外科上髁轴和临床上髁轴）及前后轴线在性别间的差异，以探讨在全膝关节置换中的临床价值。方法：对2007年6月-2008年5月本院骨科收治的80例患者共80个正常膝关节的CT资料，进行股骨远端三维图像重建，测量后髁角（PCA）、髁扭转角（CTA）、前后轴线的垂线与后髁轴线的夹角（PAPA），比较其在性别间的差异及个体的变异程度。结果：性别间的PCA（3．48±1．11）°vs（3．67±1．08）°]、CTA（5．29±1．04）°vs（5．60±1.18）°]及PAPA（3．85±1．67）°vs（4．03±2．32）°]差异均无统计学意义（P〉0．05），且PAPA的变异性较大，而PCA及CTA的变异系数较小（P〈0．05）。结论：股骨上髁轴线是全膝关节置换术股骨髁截骨的最佳参照轴线，前后轴线在性别间无差异。

Measurement of the Rotational Axis of Femoral Epicondyle by 3-D Image Reconstruction

Objective： To compare the difference of the lransepicondylar axis and the anterior posterior line in CT 3-D reconstruction image between male and female, and to investigate the clinical value in TKA. Methods： The PCA, CTA and PAPA in 80 normal cases were measured in CT reconstructed 3-D images, compared for their differences between male and female and their individual variations. Results： There were no statistic differences （P〉0.05） between male and female for PCA （3.48±1.11 ）° vs （3.67±1.08）°], CTA （5.29±1.04）° vs （5.60±1.18）°] and PAPA （3.85±1.67）° vs （4.03± 2.32 ） ° ]. The coefficients of variation were small for PCA and CTA. Conclusion： The transepicondylar axis line can be the best reference axis. There were no statistic differences between male and female for the transepieondylar axis line.