Jung Young-Bok, Jung Ho-Joong, Yang Jae Jun, Yang Dong-Lyul, Lee Yong Seuk, Song In-Sup, Lee Han Jun
Department of Orthopaedic Surgery, Medical Center of Chung-Ang University, Seoul, Republic of Korea.
J Magn Reson Imaging. 2008 Jun;27(6):1336-40. doi: 10.1002/jmri.21333.
To explore the healing process of the injured posterior cruciate ligament (PCL) by evaluating instability measurements and magnetic resonance imaging (MRI) findings.
A retrospective cross-sectional study of 46 cases of complete PCL tear who obtained MRI more than two months after injury.
A total of 13 cases (28%) showed nearly normal PCL contour, 20 cases (44%) showed continuity but deformed PCL contour, and 13 cases (28%) showed discontinuity. The duration from injury to MRI was not directly correlated with continuity. However, the group that obtained MRI more than six months after injury showed more continuity than the group that obtained MRI within six months of the injury (P < 0.01). The group with nearly normal continuity showed better stability results in the KT-1000 arthrometer and stress radiographs than the group with discontinuity (P < 0.05). The presence of other combined ligament injuries had a negative effect on regaining PCL continuity (P <0.05).
More than two-thirds (72%) of chronic PCL injury cases showed ligamentous continuity on MRI, especially when the injury had occurred more than six months before. Stability may improve as continuity is regained. The presence of other combined ligament injuries appears to prohibit spontaneous PCL healing.
通过评估不稳定测量结果和磁共振成像（MRI）表现，探讨后交叉韧带（PCL）损伤的愈合过程。
对46例完全性PCL撕裂患者进行回顾性横断面研究，这些患者在受伤两个月后接受了MRI检查。
共有13例（28%）显示PCL轮廓近乎正常，20例（44%）显示连续性但PCL轮廓变形，13例（28%）显示连续性中断。从受伤到MRI检查的时间与连续性无直接相关性。然而，受伤后6个月以上接受MRI检查的组比受伤后6个月内接受MRI检查的组显示出更多的连续性（P<0.01）。与连续性中断的组相比，连续性近乎正常的组在KT-1000关节测量仪和应力X线片上显示出更好的稳定性结果（P<0.05）。其他合并韧带损伤的存在对恢复PCL连续性有负面影响（P<0.05）。
超过三分之二（72%）的慢性PCL损伤病例在MRI上显示韧带连续性，尤其是在损伤发生超过6个月时。随着连续性的恢复，稳定性可能会提高。其他合并韧带损伤的存在似乎会阻碍PCL的自发愈合。
