TECHNICAL NOTE: ANATOMIC RECONSTRUCTION OF THE MEDIAL PATELLOFEMORAL LIGAMENT WITH ALLOGRAFT IN RECURRING PATELLAR DISLOCATION

Abstract

The medial patellofemoral ligament reconstruction technique is effective, safe, reproducible and with low morbidity in the treatment of recurrent patellar luxation. The steps in this technique: 1) Patient in supine position. 2) Diagnostic arthroscopy with release of the lateral retinaculum and assessment of associated lesions. 3) 2 to 3 cm incision on the supero - medial border of the patella. 4) Make two tunnels 20 to 22 mm deep and 4 mm in diameter through the thickness of the patella under fluoroscopy. 5) Fix two anchors from the medial edge of the patella and tie to the allograft with high strength suture. 6) The Schöttle's point is identified under fluoroscopy. 7) 2 to 3 cm incision in the medial epicondyle. 8) A 2 mm Kirschner is placed from medial to lateral, posterior to anterior, and distal to proximal. 9) The length, thickness and desired final tension of the allograft are measured. 10) The femoral tunnel is made with a cannulated drill, 1 mm greater than the thickness of the allograft. 11) The eyelet nail is used to pass the suture and pull the allograft from medial to lateral. 12) The allograft is fixed with a biodegradable screw with the knee at 30 ° flexion, assessing the desired final tension. 13) The washing and closing are carried out by planes up to the skin.