Fox R J, Harner C D, Sakane M, Carlin G J, Woo S L
Department of Orthopaedic Surgery, University of Pittsburgh, Pennsylvania, USA.
Am J Sports Med. 1998 May-Jun;26(3):395-401. doi: 10.1177/03635465980260030901.
We examined the in situ forces in the posterior cruciate ligament as well as the force distribution between its anterolateral and posteromedial bundles. Using a robotic manipulator in conjunction with a universal force-moment sensor system, we applied posterior tibial loads from 22 to 110 N to the joint at 0 degrees to 90 degrees of knee flexion. The magnitude of the in situ force in the posterior cruciate ligament and its bundles was significantly affected by knee flexion angle and posterior tibial loading. In situ forces in the posterior cruciate ligament ranged from 6.1 +/- 6.0 N under a 22-N posterior tibial load at 0 degree of knee flexion to 112.3 +/- 28.5 N under a 110-N load at 90 degrees. The force in the posteromedial bundle reached a maximum of 67.9 +/- 31.5 N at 90 degrees of knee flexion, and the force in the anterolateral bundle reached a maximum of 47.8 +/- 23.0 N at 60 degrees of knee flexion under a 110-N load. No significant differences existed between the in situ forces in the two bundles at any knee flexion angle. This study provides insight into the knee flexion angle at which each bundle of the posterior cruciate ligament experiences the highest in situ forces under posterior tibial loading. This information can help guide us in more accurate graft placement, fixation, and tensioning, and serve as an assessment of graft performance.
我们研究了后交叉韧带的原位力以及其前外侧束和后内侧束之间的力分布。通过将机器人操纵器与通用力-力矩传感器系统相结合，我们在膝关节屈曲0度至90度时，对关节施加22至110牛的胫骨后负荷。后交叉韧带及其束的原位力大小受到膝关节屈曲角度和胫骨后负荷的显著影响。后交叉韧带的原位力范围从膝关节屈曲0度时22牛胫骨后负荷下的6.1±6.0牛到90度时110牛负荷下的112.3±28.5牛。在110牛负荷下，后内侧束的力在膝关节屈曲90度时达到最大值67.9±31.5牛，前外侧束的力在膝关节屈曲60度时达到最大值47.8±23.0牛。在任何膝关节屈曲角度下，两束的原位力之间均无显著差异。本研究深入了解了在胫骨后负荷下后交叉韧带各束承受最高原位力时的膝关节屈曲角度。这些信息有助于指导我们更准确地进行移植物放置、固定和张紧，并作为移植物性能的评估依据。
