Fig. 10
From: The morphology of the femoral posterior condyle affects the external rotation of the femur
The relationship between the tilt of posterior condyle and the rotation of the femur. A When both the medial and lateral posterior condyles are tilted medially, a medially directed force is produced during knee flexion, resulting in external rotation of the femur. B When the medial posterior condyle is tilted laterally, the forces generated by the tilt of medial and lateral posterior condyles are cancelled out