Isolated medial patellofemoral ligament reconstruction for recurrent patellofemoral instability: analysis of outcomes and risk factors

Abstract Background The medial patellofemoral ligament (MPFL) is always damaged after patellar dislocation. In selected patients, MPFL reconstruction necessary to restore a correct tracking. Despite the large number of different techniques reported reconstruct MPFL, there no consensus concerning optimal procedure, and debates still ongoing. present study analysed results isolated in patients with instability. Furthermore, subgroup analysis presenting pathoanatomical risk factors was made. Methods November 2020, main electronic databases were accessed. All articles reporting primary for recurrent instability considered inclusion. Only minimum 12-month follow-up eligible. Results Data from total 1777 knees collected. mean age involved 22.8 ± 3.4 years. 40.7 25.8 months. Overall, range motion (+ 27.74; P < 0.0001) all other scores interests improved at last follow-up: Kujala 12.76; = 0.0003), Lysholm 15.69; 0.0001), Tegner score 2.86; 0.006). Seventy-three 1780 (4.1%) showed positive apprehension test. Thirty 1765 (1.7%) experienced re-dislocations, while 56 1778 (3.2%) persisting joint Twenty-five 1786 (1.4%) underwent revision surgeries. Conclusion Isolated provides reliable surgical outcomes. Patients predisposing worse