膝关节后内侧结构生物力学意义及损伤的MRI表现

目的:分析膝关节后内侧结构的解剖、生物力学特点及临床意义;阐述膝关节后内侧结构的MRI正常及损伤后表现;进行后内侧结构损伤MRl分级.方法:回顾分析87例后内侧结构、以及其他相关损伤的MRI所见.结果:本组87例后内侧结构损伤,Ⅰ级损伤29例,Ⅱ级47例,Ⅲ级11例;合并交叉韧带损伤34例(39%),内侧半月板后角撕裂...

Biomechanical significance of posteromedial structure of knee joint and MRI findings of its injuries

Objective：To analyze the anatomical and biomechanical characteristics of posteromedial structure（PMS） of knee joint,to classify the PMS injuries findings on MRI and to reveal its clinical significance to surgical reconstruction of cruciate ligaments.Methods：MRI findings on 87 patients with PMS injuries were retrospectively analyzed.Results：Of the 87 patients with PMS injuries,29 were graded Ⅰ,47 were graded Ⅱ and 11 were graded Ⅲ.34 of 87 cases（39%） had also cruciate ligments injuries,13（14.5%） had posterior corner tear of medial meniscus,9（10.3%） had posterolateral structure injuries and 2（0.23%） had pes anserinus injuries.Forty-four patients with partial or complete cruciate ligaments tears were surgically reconstructed and of 36 of them（81.8%） recovered,while 8（18.2%） still had knock knee sign.Conclusion：PMS is complex and significantly contributes to maintain the dynamic and static stability of knee joint.PMS are easily involved in knee trauma and are frequently concomitant with cruciate ligaments injuries and medial meniscus tears.MRI diagnostic accuracy can be improved by well understanding the PMS anatomy.Cruciate ligament reconstruction procedures ignoring the PMS injury can result in poor outcomes or failures.So it is necessary to perform MRI scan and grade PMS injures before surgery.MRI is the ideal imaging modality to display PMC injuries and the concomitant partial or complete tears of tendons and ligaments.