Treatment of patellofemoral instability in adolescent by anatomical double-bundle medial patellofemoral ligament reconstruction with double suture anchor technique / 中南大学学报(医学版)

ABSTRACT

Objective:To explore the clinical outcomes of anatomical double-bundle medial patellofemoral ligament (MPFL) reconstruction with double suture anchor technique in treating patellofemoral instability in adolescent.Methods:Twenty-five young people with patellofemoral instability (25 knees) in our department from January 2013 to December 2014 were enrolled for this study.All patients were performed anatomical double-bundle MPFL reconstruction with arthroscopic-assisted suture anchors technique in the patella,and fixed in the femoral socket with absorbable interference screw.All patients are evaluated by different methods,including patient's satisfaction,patellar apprehension test,recurrent subluxation/dislocation,CT assessment of bone tunnel and patellar tilt angle.Lysholm scores,Tegner scores and Kujala scores were recorded at the final follow-up.Results:The mean follow-up was 24 (range 20-40) months.All cases were observed in negative patellar apprehension test.Infection,recurrent subluxation/dislocation and patellar fracture were not found at the last follow-up.CT results demonstrated that the tunnel position were good.The patellar tilt angle was decreased from 21.6°±2.3° to 10.5°±1.6° (P＜0.05);the Lysholm scores was increased from 51.7±5.3 to 93.8±6.5 (P＜0.05).Tegner scores was increased from 4.1± 1.1 to 5.5±0.6 (P＜0.05).Kujala scores was increased from 53.5±6.4 to 94.6±4.3 (P＜0.05).Conclusion:Arthroscopic-assisted anatomical double-bundle MPFL reconstruction with the suture anchors technique is a safe,minimal invasive and effective surgical option for treating patellofemoral instability in adolescent.