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Please explain what happens with a posterior cruciate ligament tear?

2 doctors weighed in
Dr. Allen Lu
Orthopedic Surgery
1 doctor agrees

In brief: Instability

The posterior cruciate ligament (pcl) is the ligament that keeps the tibia (shin bone) in line with the femur (thigh bone), and keeps it from dropping back behind.
When it tears, the body tries to heal the tear but in a looser position. Sometimes this is loose enough to cause instability (where the knee sags back and is unable to maintain a normal position. This can cause other tears or disability.

In brief: Instability

The posterior cruciate ligament (pcl) is the ligament that keeps the tibia (shin bone) in line with the femur (thigh bone), and keeps it from dropping back behind.
When it tears, the body tries to heal the tear but in a looser position. Sometimes this is loose enough to cause instability (where the knee sags back and is unable to maintain a normal position. This can cause other tears or disability.
Dr. Allen Lu
Dr. Allen Lu
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