Single allograft medial collateral ligament and posterior oblique ligament reconstruction: a technique to improve valgus and rotational stability

Abstract

We present a novel and simple method for single hamstring allograft MCL and PMC reconstruction, which can improve both joint valgus and external rotational stability and maximize utilization of allograft. All patients received arthroscopic evaluation through inferomedial and inferolateral knee incisions to ascertain whether there were intra-articular injuries. An 8-cm-length longitudinal incision was made from 1 cm above adductor tubercle to 5-cm proximal medial tibia joint line. The anterior tibia insertion was defined as 15 mm lateral from the medial tibia edge and 45 mm below the medial tibia joint line. The posterior tibia insertion was defined as 15 mm lateral from the medial tibia edge and 20 mm below the medial tibia joint line. A 5- or 6-mm reamer was used to drill the tibia tunnel along with guide pin, and a 6 or 7 mm drill was used to drill the femur tunnel to a depth of 25 or 30 mm until the proximal adductor tubercle. The allograft was harvested from tibia and placed into the tunnel and fixed with absorbable interference screw. All patients performed active rehabilitation exercises after the operation periodically.