Clinical Outcomes of Medial Patellofemoral Ligament Reconstruction Using Semitendinosus Autograft for Recurrent Patellar Dislocation

Abstract

Background: Recurrent patellar dislocation is a rare but complex issue. Medial patellar stabilizer insufficiency, particularly with the medial patellofemoral ligament (MPFL), is commonly present in these patients. There are several surgical methods to address this problem. Purpose: To evaluate the clinical outcome of MPFL reconstruction when using a semitendinosus autograft and a novel tendon fixation technique to treat recurrent patellar dislocation. Methods: Twelve consecutive patients (5 males, 7 females) who failed in conservative treatment were enrolled into this prospective study. They were treated with MPFL reconstruction using a semitendinosus autograft. The mean follow-up time was 16.7 months (range, 14-22 months). Preoperative and postoperative radiographic parameters, functional scores (e.g., Lysholm knee scoring scale and Kujala scale), and postoperative complications were evaluated. Results: Eleven of twelve patients (91.7%) had good-to-excellent outcomes. There were statistically significant improvements in the Lysholm knee scoring scale (p＜0.001) and Kujala scale (p＜0.001). Additionally, the postoperative tilt angle improved significantly (p＜0.001). Conclusions: Using a semitendinosus autograft with Bioscrew fixation and an additional pull-out suture during MPLF reconstruction is a safe and effective method for treating recurrent patellar dislocation in selective patients.