Suganuma Jun, Mochizuki Ryuta
Department of Orthopedic Surgery, Hiratsuka City Hospital, Hiratsuka, Kanagawa, Japan.
Yamabiko Hiratsuka Clinic for Orthopedic and Rheumatic Disease, Hiratsuka, Kanagawa, Japan.
Arthrosc Tech. 2024 Jul 25;14(1):103160. doi: 10.1016/j.eats.2024.103160. eCollection 2025 Jan.
In a knee with cam impingement of the posterior femoral condyle, the posterior horn of the medial meniscus (PHMM) is pinched and damaged between the medial femoral condyle (MFC) and the medial tibial plateau during deep flexion of the knee. The cam impingement is caused by an osseous bulge on the posteromedial surface of the distal femoral metaphysis and the absence of an alcove for the PHMM at the junction of the MFC and the posteromedial metaphysis of the femur. Therefore, the osseous bulge needs to be resected and the alcove needs to be restored when the PHMM is decompressed. However, it is difficult to evaluate whether the bone resection is sufficient to decompress the PHMM intraoperatively. Therefore, we developed a method to evaluate arthroscopically whether the PHMM is compressed between the MFC and the medial tibial plateau. This technique enables necessary and sufficient resection of bone tissue, regardless of the volume of the PHMM.
在存在股骨后髁凸轮撞击的膝关节中，内侧半月板后角（PHMM）在膝关节深度屈曲时被夹在股骨内侧髁（MFC）和胫骨内侧平台之间并受损。凸轮撞击是由股骨远端干骺端后内侧表面的骨性隆起以及在MFC与股骨后内侧干骺端交界处缺乏用于PHMM的凹腔所致。因此，在对PHMM进行减压时，需要切除骨性隆起并恢复凹腔。然而，术中很难评估骨切除是否足以对PHMM进行减压。因此，我们开发了一种通过关节镜评估PHMM是否被夹在MFC和胫骨内侧平台之间的方法。该技术能够对骨组织进行必要且充分的切除，而与PHMM的体积无关。
