Objective: Among the numerous techniques available,medial patellofemoral ligament(MPFL)reconstruction is increasingly used for the surgical treatment of objective patellar instability.Although the value of this technique has been demonstrated,few studies have assessed predictors of good clinical results.The main objective of this study was to isolate through a clinical series of 107 patients,the clinical and radiological predictors that can significantly influence the clinical results of the MPFL ligament.