In this Section
The PCL, Injuries, and Surgery
The posterior cruciate ligament (PCL) is one of the four major ligaments of the knee. The PCL, along with the ACL, is located in the center of knee. Its primary function is to prevent posterior translation of the tibia on the femur. The PCL also plays a role in the side-to-side stability of the knee.
The PCL is injured less commonly than the ACL. The most common mechanism of injury involves a blow to the front of the tibia (shin bone) when the knee is bent. PCL tears can occur as isolated injuries or can be associated with other knee injuries.
The symptoms of a PCL injury are usually less dramatic than those of an ACL tear. Swelling is often only mild. The pain from a PCL injury is usually resolved within 2-4 weeks. However, a sense of instability may persist, especially when changing directions.
Treatment for isolated PCL injuries initially focuses on rehabilitation and strengthening after the pain and swelling subside. Partial tears of the PCL do not usually require surgical treatment; even isolated complete tears of the PCL do not always need surgical treatment.
If symptoms of instability persist after rehabilitation, surgical reconstruction of the PCL is recommended. Modern PCL surgery involves completely removing the torn ligament and reconstructing the torn PCL using a minimally invasive arthroscopic technique. The new PCL is made using a tendon graft, obtained from either the patient or cadaver (allograft). Furthermore, PCL reconstruction surgery is typically performed as an outpatient procedure.