ACL Reconstruction / The Knee
ACL Injuries
When the ACL tears, the person often describes hearing a pop and feeling the knee "giving out" or buckling. A torn ACL often results in swelling and a loss of stability in the knee, sometimes referred to as "feeling loose."
There are several different types of ACL tears: a partial tear of the ligament, a complete tear of the ligament (rupture), and rarely the very end of the ligament remains attached to a small piece of bone which breaks or separates from the lower leg bone (avulsion).