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首页> 外文期刊>Journal of orthopaedic research >Tension patterns of the anteromedial and posterolateral grafts in a double-bundle anterior cruciate ligament reconstruction.
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Tension patterns of the anteromedial and posterolateral grafts in a double-bundle anterior cruciate ligament reconstruction.

机译：双束前交叉韧带重建中前内侧和后外侧移植物的张力模式。

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摘要

The two functional bundles of the anterior cruciate ligament (ACL), namely, the anteromedial (AM) and posterolateral (PL) bundles, must work in concert to control displacement of the tibia relative to the femur for complex motions. Thus, the replacement graft(s) for a torn ACL should possess similar tension patterns. The objective of the study was to examine whether a double-bundle ACL reconstruction with the semitendinosus-gracilis autografts could replicate the tension patterns of those for the intact ACL under controlled in vitro loading conditions. By means of a robotic/universal force moment sensor (UFS) testing system, the in situ force vectors (both magnitude and direction) for the AM and PL bundles of the ACL, as well as their respective replacement grafts, were determined and compared on nine human cadaveric knees. It was found that double-bundle ACL reconstruction could closely replicate the in situ force vectors. Under a 134-N anterior tibial load, the resultant force vectors for the intact ACL and the reconstructed ACL had a difference of 5 to 11 N (p > 0.05) in magnitude and 1 to 13 degrees (p > 0.05) in direction. Whereas, under combined rotatory loads of 10-N-m valgus and 5-N-m internal tibial torques, the corresponding differences were 10 to 16 N and 4 degrees to 11 degrees, respectively. Again, there were no statistically significant differences except at 30 degrees of flexion where the force vector for the AM graft had a 15 degrees (p < 0.05) lower elevation angle than did the AM bundle.
机译：前交叉韧带（ACL）的两个功能束，即前内侧束（AM）和后外侧束（PL），必须协同工作，以控制复杂运动引起的胫骨相对于股骨的移位。因此，用于撕裂的前交叉韧带的替代移植物应具有相似的张力模式。这项研究的目的是检查用半腱肌自体移植物进行双束ACL重建是否可以在受控的体外负荷条件下复制完整ACL的张力模式。通过机器人/通用力力矩传感器（UFS）测试系统，确定并比较了ACL的AM和PL束以及它们各自的替代移植物的原位力矢量（大小和方向）。九个人尸体膝盖。发现双束ACL重建可以紧密复制原位力向量。在134 N前胫骨载荷下，完整ACL和重建ACL的合力矢量在大小上相差5到11 N（p> 0.05），在方向上相差1到13度（p> 0.05）。而在10-N-m外翻和5-N-m胫骨内扭矩的组合旋转载荷下，相应的差异分别为10到16 N和4到11度。再次，没有统计学上的显着差异，除了在30度屈曲时，AM移植物的力矢量的仰角比AM束低15度（p <0.05）。

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