Rupture of the Anterior Cruciate Ligament (ACL) is a common sporting injury. It usually happens as a result of a severe twisting injury or excessive hyperextension of the knee. The ACL is deep inside the knee and stops the tibia (shin bone) from sliding forward on the femur (thigh bone). It also stops the knee from rotating inappropriately.
Some people with ruptured ACL recover to have no symptoms and need no specific treatment.
Some have feelings of instability in the knee or feel like they can’t trust the knee. Generally, those with feelings of instability or people who want to continue to play sport or anyone under 30 will require reconstruction of a ruptured ACL.