The anterior cruciate ligament, or ACL , is a part of the knee that is prone to injury. Learn about the causes and symptoms of an ACL injury here, as well as about the treatment options and ... The ACL Anthology currently hosts 118309 papers on the study of computational linguistics and natural language processing. Learn about ACL tear, a common knee injury that can happen during sports or accidents. Find out how to diagnose, treat and prevent ACL tears and their complications. ACL reconstruction surgery is a medical procedure designed to reconstruct a torn anterior cruciate ligament ( ACL ) in the knee. This surgical intervention is commonly performed to restore stability and function to the knee joint following an ACL injury. During the procedure, the damaged ligament is replaced with a graft, often taken from the patient's own body (autograft) or from a donor (allograft).