[Stabilization of the external condyle of the knee in chronic anterior laxity. Importance of the popliteal muscle].

The authors have made an anatomical and experimental study in cadavers. They consider that one of the main features of chronic anterior instability of the knee is related to the instability of the lateral femoral condyle. This is due to the loss of its two stabilizers: the anterior cruciate ligament and the popliteal muscle.