Cao Guorui, Wang Yixiang, Shi Xiaotan, Wang Xiao, Yang Lanbo, Wang Peizhao, Yuan Yanhao, Tan Honglue
Department of Knee Surgery, Luoyang Orthopedic Hospital of Henan Province, Orthopedic Hospital of Henan Province, Luoyang, Henan Province, People's Republic of China.
Department of Orthopedic, Graduate Collaborative Training Base of the Third Affiliated Hospital of Guangxi University of Chinese Medicine, Liuzhou, Guangxi Zhuang Autonomous Region, People's Republic of China.
BMC Musculoskelet Disord. 2025 Aug 13;26(1):782. doi: 10.1186/s12891-025-09040-w.
Multiligament knee injuries (MLKIs) often involve the medial patellofemoral ligament (MPFL), but evidence regarding the effects of MPFL tears on patellar stability and knee function following MLKIs is still lacking. This study included patients with MLKIs and aimed (1) to investigate the incidence of MPFL tears, (2) to evaluate whether untreated MPFL tears lead to patellar instability, and (3) to compare the clinical and functional outcomes between patients with and without MPFL tears.
The clinical data of 45 patients were analysed retrospectively from November 2015 to September 2022. The MLKIs and MPFL injuries were evaluated via physical examination and magnetic resonance imaging. All patients underwent single-stage surgery, in which the ACL and PCL were reconstructed via arthroscopy, and the MPFL tears were not treated. The patients were divided into an MPFL tear group (n = 23) and an MPFL intact group (n = 22). The symptom of patellar instability were evaluated via the Kujala Knee Questionnaire. Knee function was evaluated via the Lysholm, Tegner, and International Knee Documentation Committee score.
Twenty-three patients (51.1%) developed MPFL tears in MLKIs. The mean follow-up time was 62.2 (18-100) months. During the follow-up period, no patients experienced symptoms of patellofemoral instability or patellar dislocation. There was no significant difference in the Kujala Knee Questionnaire score between the two groups (95.9 ± 3.4 vs. 94.6 ± 9.5, P = 0.663). The knee function score did not differ between MLKI patients with and without MPFL tears.
MPFL tears occur in 51.1% of patients with MLKIs but do not result in patellar instability or affect knee function.
膝关节多韧带损伤（MLKIs）常累及髌股内侧韧带（MPFL），但关于MLKIs后MPFL撕裂对髌骨稳定性和膝关节功能影响的证据仍不足。本研究纳入了MLKIs患者，旨在（1）调查MPFL撕裂的发生率，（2）评估未经治疗的MPFL撕裂是否会导致髌骨不稳定，以及（3）比较有和没有MPFL撕裂患者的临床和功能结局。
回顾性分析2015年11月至2022年9月期间45例患者的临床资料。通过体格检查和磁共振成像评估MLKIs和MPFL损伤情况。所有患者均接受一期手术，其中通过关节镜重建前交叉韧带（ACL）和后交叉韧带（PCL），而MPFL撕裂未进行治疗。将患者分为MPFL撕裂组（n = 23）和MPFL完整组（n = 22）。通过Kujala膝关节问卷评估髌骨不稳定症状。通过Lysholm、Tegner和国际膝关节文献委员会评分评估膝关节功能。
23例患者（51.1%）在MLKIs中出现MPFL撕裂。平均随访时间为62.2（18 - 100）个月。随访期间，没有患者出现髌股关节不稳定或髌骨脱位症状。两组之间的Kujala膝关节问卷评分无显著差异（95.9 ± 3.4 vs. 94.6 ± 9.5，P = 0.663）。有和没有MPFL撕裂的MLKI患者的膝关节功能评分没有差异。
51.1%的MLKIs患者发生MPFL撕裂，但未导致髌骨不稳定或影响膝关节功能。
