Clinical application of femoral derotation osteotomy combined with medial patellofemoral ligament reconstruction for patellar dislocation with excessive femoral internal torsion

摘要

Recurrent patellar dislocation (RPD) is multifactorial disease, and excessive femoral internal torsion has been considered as an important risk factor for recurrence of patellar dislocation and graft failure after surgery. 1 Satisfactory clinical outcomes depend on cor- recting of the pathologic abnormalities around the patellofemoral joint and torsional deformity of the lower extremity. At present, conventional isolated medial patellofemoral ligament (MPFL) reconstruction without addressing excessive femoral internal tor- sion maylead toMPFL graft failure, 2,3 because increased femoral in- ternal torsion can significantly increase a persistently lateralizing force on the patella. 4 Considering these predisposing factors and to provide an optimal treatment for RPD with increased femoral in- ternal torsion, we presented our surgical technique regarding the clinical application of MPFL reconstruction combined with supra- condylar femoral derotation osteotomy, and make a brief introduc- tion of its surgical techniques.