LVR Klinik für Orthopädie Viersen, Horionstrasse 2, 41749 Viersen, Germany.
Int Orthop. 2012 Jan;36(1):83-8. doi: 10.1007/s00264-011-1295-6. Epub 2011 Jun 25.
It is broadly supposed that in total knee arthroplasty, the flexion/extension gap ratio is increased after resection of the posterior cruciate ligament (PCL). However, studies are rare and results are inconsistent. Therefore, this study was conducted to determine whether PCL release regularly increases the flexion gap.
Data from 50 consecutive posterior stabilised knee prostheses were analysed retrospectively. Using imageless computer navigation, the joint-gap width was measured over the entire range of motion before and after PCL release.
PCL release had no effect on the extension gap, but it increased the flexion gap significantly. An increase of >3 mm occurred in 36% of patients and of >5 mm in 12%. No clinically relevant effect (<2 mm) was found in 44% of patients.
PCL release increased the flexion/extension gap ratio on average, but the individual effect could not be predicted. Therefore, we recommend PCL release before the femoral resections are performed, as this step mainly determines the ratio between extension and flexion gap.
人们普遍认为，在全膝关节置换术中，切除后交叉韧带（PCL）后会增加屈伸间隙比。然而，相关研究较少，结果也不一致。因此，本研究旨在确定 PCL 松解是否会常规增加屈曲间隙。
回顾性分析了 50 例连续的后稳定膝关节假体的数据。使用无图像计算机导航，在 PCL 松解前后测量整个运动范围内的关节间隙宽度。
PCL 松解对伸展间隙没有影响，但显著增加了屈曲间隙。36%的患者增加>3 毫米，12%的患者增加>5 毫米。44%的患者没有发现有临床意义的影响（<2 毫米）。
PCL 松解平均增加了屈伸间隙比，但个体影响无法预测。因此，我们建议在进行股骨切除之前进行 PCL 松解，因为这一步主要决定了伸展和屈曲间隙之间的比例。
