Surgical procedure at the distal epiphysis of the femur: The skin incision extends between the lateral femoral condyle and the tibial tuberosity of the tibia (Fig. 6a). The incision in the aponeurosis of the biceps femoris muscle (Fig. 6b) is made perpendicular to the muscle fibres of the biceps femoris muscle and the drill hole is inserted just proximal to the origin of the lateral collateral ligament of the stifle joint (Fig. 6c).