The anterior cruciate ligament, or ACL, is part of the knee. Damage to the ACL is one of the more common, serious, and painful knee injuries. Three bones — the shinbone, thighbone, and the patella — ...
An anterior cruciate ligament (ACL) tear is an injury to the ligament in your knee that keeps your shinbone from sliding forward. The ACL stabilizes your knee, so tearing it either partially or ...