自体半腱肌肌腱重建膝关节后外侧角的生物力学研究

目的对半腱肌肌腱重建膝关节后外侧角的方法进行生物力学研究,评价其恢复膝关节后外侧稳定性的作用。方法应用半腱肌肌腱对8例新鲜尸体膝关节进行膝关节后外侧角的重建,分别于膝关节屈曲0°、30°、60°、90°时对胫骨施加外旋及内翻扭距,测量膝关节外旋及内翻变化。结果膝关节后外侧角切断后膝关节外旋内翻均明显增加,半腱肌肌腱重建膝关节后外侧角术后在屈膝0°、30°、60°、90°外旋及内翻大于完整膝关节,但与完整膝关节比较差异无统计学意义(P>0.05)。结论应用半腱肌肌腱重建膝关节后外侧角能有效恢复膝关节静力稳定性,是一种理想的膝关节后外侧角重建方法。

An biomechanics analysis of anatomical posterolateral corner reconstruction of the knee using auto-scanitendinosus

Objective To evaluate the biomechanical effect of anatomical posterolateral corner reconstruction of the knee using auto-semitendinosus.Methods Auto-semitendinosus tendon was used to reconstruct the posterolateral corner in 8 cadaveric knees,static tests were performed on the intact,sectioned,and reconstructed knee at 0°30°、60°、90°of flexion,measured the change of external rotation and varus after external rotation torque and varus rotation torque was given the tibia.Results After the PLC was divided,a significant increase was obsewed at any flexion angle,adn the angle of external rotation and varus were increase 0°,30°,60°,90°of flexion,but there were no significant differences between the intact and reconstructed knee(P>0.05).Conclusion This technique shows good results in restore the static stability of the knee,and it is and ideal method for the treatment of PLC injuries.