前交叉韧带损伤对内侧副韧带应变的影响

目的：研究前交叉韧带（anterior cruciate ligament，ACL）受损对内侧副韧带（medial collateral ligament，MCL）应变的影响。 方法：将6具新鲜膝关节屈曲90°固定在自制夹具上，将ACL分为未切断组、前内侧束（anteromedial bundle, AMB）切断组和ACL全切断组，加载800 N的负荷，比较各组MCL的应变数据。结果：AMB切断组、ACL全切断组与未切断组比较，MCL应变值均有明显升高（P<0.05）。AMB切断组和ACL全切断组MCL的应变值比较，差异无统计学意义（P>0.05）。结论：ACL损伤会引起MCL的生物力学显著变化，AMB切断和ACL全切断对MCL的影响没有明显差异。

Effect of anterior cruciate ligament rupture on the strain of medial collateral ligament

ObjectiveTo explore the effect of anterior cruciate ligament(ACL) rupture on the biomechanics of medial collateral ligament (MCL). MethodsSix fresh human knee joints were fixed on the self-made fixture and flexed 90°. ACL was divided into a normal group, an anteromedial bundle(AMB) break group, and an ACL complete break group. 800N burden was loaded, and the MCL strain data were compared among the 3 groups. ResultsThe MCL strain was significantly increased in the AMB break group and the ACL complete break group than that in the normal group(P<0.05). There was no significant difference in the MCL strain between the AMB break group and the ACL complete break group(P>0.05). Conclusion ACL rupture may cause significant changes in the MCL biomechanics, but the effect of AMB break and ACL complete break on MCL has no significant difference.