The PCL is the strongest intracapsular knee ligament, connecting the posterior tibial plateau to the anterior medial femoral condyle, serving as the primary restraint against posterior tibial displacement.
Prevents the tibia sliding backward beneath the femur during knee flexion under load.
PCL injuries occur from direct posterior tibial force (dashboard injury) and present with a positive posterior drawer. Isolated tears often managed non-operatively.
Posterior tibial force or hyperflexion tear producing posterior knee pain and a positive posterior drawer sign — the tibia sags backward at 90° flexion.
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