Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
Department of Orthopaedic Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
Br J Radiol. 2022 May 1;95(1133):20210976. doi: 10.1259/bjr.20210976. Epub 2022 Feb 9.
To evaluate whether measurement of protruding anterior meniscus in the medial compartment (PAMM) and posterior tibial translation (PTT) can be used as a secondary sign of posterior cruciate ligament (PCL) tear for differential diagnosis of partial or complete tear.
21 cases with complete PCL tear, 35 cases with partial PCL tear, and 55 normal cases were reviewed in this retrospective study. PTT and PAMM were measured from the MR images associated with each case. Non-parametric data were evaluated using the Kruskal-Wallis test and the Mann-Whitney -test with Bonferroni correction to compare differences among the three groups: complete tear, partial tear, and controls.
There were significant differences in the median values of PAMM among the three groups, and with PAMM increasing as the grade of PCL injury increased. However, there were no significant differences in median PTT among the three groups. Median PAMM in the partial and complete tear groups was significantly higher than in subjects without PCL rupture (adjusted -value <0.05). Although median PAMM in subjects in the complete tear group tended to be higher than in those with a partial tear, this difference was not statistically significant (adjusted -values ≥0.418).
PAMM is more useful finding than PTT and can predict PCL tear with or without posterior instability. However, PAMM cannot differentiate partial tear and complete tear of the PCL.
PAMM is more useful finding than PTT and can predict PCL tear with or without posterior instability. However, PAMM cannot differentiate partial tear and complete tear of the PCL.
评估内侧间室半月板前突（PAMM）和胫骨后移（PTT）的测量是否可作为后交叉韧带（PCL）撕裂的次要征象，用于部分或完全撕裂的鉴别诊断。
本回顾性研究纳入 21 例完全 PCL 撕裂、35 例部分 PCL 撕裂和 55 例正常对照。从与每个病例相关的 MRI 图像中测量 PTT 和 PAMM。使用 Kruskal-Wallis 检验和曼-惠特尼 U 检验（Bonferroni 校正）对非参数数据进行评估，以比较三组之间的差异：完全撕裂、部分撕裂和对照组。
三组间 PAMM 的中位数有显著差异，随着 PCL 损伤程度的增加而增加。然而，三组间 PTT 的中位数无显著差异。部分撕裂和完全撕裂组的 PAMM 中位数明显高于无 PCL 断裂的对照组（校正值<0.05）。尽管完全撕裂组的 PAMM 中位数倾向于高于部分撕裂组，但差异无统计学意义（校正值≥0.418）。
PAMM 比 PTT 更有用，可以预测有无后向不稳定的 PCL 撕裂。然而，PAMM 不能区分 PCL 的部分撕裂和完全撕裂。
PAMM 比 PTT 更有用，可以预测有无后向不稳定的 PCL 撕裂。然而，PAMM 不能区分 PCL 的部分撕裂和完全撕裂。
