An In Vitro Analysis of an Anatomical Medial Knee Reconstruction

BackgroundAn anatomical medial knee reconstruction has not been described in the literature.HypothesisKnee stability and ligamentous load distribution would be restored to the native state with an anatomical medial knee reconstruction.Study DesignControlled laboratory study.MethodsTen nonpaired cadaveric knees were tested in the intact, superficial medial collateral ligament and posterior oblique ligament—sectioned, and anatomically reconstructed states. Each knee was tested at 0°, 20°, 30°, 60°, and 90° of knee flexion with a 10-N·m valgus load, 5-N·m external and internal rotation torques, and 88-N anterior and posterior drawer loads. A 6 degrees of freedom electromagnetic motion tracking system measured angulation and displacement changes of the tibia with respect to the femur. Buckle transducers measured the loads on the intact and reconstructed proximal and distal divisions of the superficial medial collateral ligament and the posterior oblique ligament.ResultsA significant increase was found in valg...