Lateral Retinaculum Plasty Versus Lateral Retinaculum Release With Concomitant Medial Patellofemoral Ligament Reconstruction

Purpose: To elucidate the outcomes of lateral retinaculum plasty versus lateral retinaculum release with concomitant medial patellofemoral ligament(MPFL)reconstruction.Methods: In this study,59 patients treated at our institution between 2012 to 2015 were included.The 59 patients were divided into two groups.Group I included 27 patients who underwent lateral retinaculum release and MPFL reconstruction.Group II included 32 patients who underwent lateral retinaculum plasty and MPFL reconstruction.All patients were followed up for at least 2 years and all assessments were performed both pre-and post-operation.Clinical evaluation consisted of the Kujala score,patellar medial glide test,and patellar tilt angle,patellar lateral shift,and congruence angle,measured on CT scan.Results: Significant improvement was seen after surgery in both groups.The group of lateral retinaculum plasty achieved better results than the group of lateral retinaculum release.No statistically significant differences were found in lateral patellar shift(ns)or congruence angle(ns)between the groups.There were significant differences in Kujala score(P < 0.05)patellar tilt angle(P < 0.05),and patellar medial glide test(P < 0.05)between the groups.Conclusions: MPFL reconstruction with lateral retinaculum plasty yielded better results than MPFL with lateral retinaculum release.Postoperatively,medial and lateral function were restored,and patellar tracking was normal.Lateral retinaculum plasty is a new method that reduces the complications of lateral retinaculum release for patellar dislocation.