Rupture of posterior cruciate ligament leads to radial displacement of the medial meniscus

BMC Musculoskeletal Disorders

Research Article

Wei Luo¹  Hongbo He¹  Can Zhang¹  Kanghua Li¹  Zhenhan Deng¹  Yihe Hu¹  Zhan Liao¹  Wenfeng Xiao¹ 

[1] Department of Orthopaedics, Xiangya Hospital, Central South University, No.87 Xiangya Road, 410008, Changsha, Hunan, China;

关键词: PCL rupture;    Medial meniscus;    Radial displacement;   

DOI  :  10.1186/s12891-017-1646-6

 received in 2016-09-21, accepted in 2017-06-27,  发布年份 2017

来源: Springer

【 摘 要 】

BackgroundTo explore the association between the rupture of posterior cruciate ligament (PCL) and the radial displacement of medial meniscus under the conditions of different flexion and various axial loads.MethodsThe radial displacement value of medial meniscus was measured for the specimens of normal adult knee joints, including 12 intact PCLs, 6 ruptures of the anterolateral bundle (ALB), 6 ruptures of the postmedial bundle (PMB), and 12 complete ruptures. The measurement was conducted at 0°, 30°, 60°, and 90° of knee flexion angles under 200 N, 400 N, 600 N, 800 N and 1000 N of axial loads respectively.ResultsThe displacement values of medial meniscus of the ALB rupture group increased at 0° flexion under 800 N and 1000 N, and at 30°, 60° and 90° flexion under all loads in comparison with the PCL intact group. The displacement values of the PMB rupture group was higher at 0° and 90° flexion under all loads, and at 30° and 60° flexion under 800 N and 1000 N loads. The displacement of the PCL complete rupture group increased at all flexion angles under all loads.ConclusionsEither partial or complete rupture of the PCL can increase in the radial displacement of the medial meniscus, which may explain the degenerative changes that occuring in the medial meniscus due to PCL injury. Therefore, early reestablishment of the PCL is necessarily required in order to maintain stability of the knee joint after PCL injury.

【 授权许可】

CC BY   
© The Author(s). 2017