What could cause posterior cruciate ligament (pcl) injury ?

Force!: The PCL is probably the strongest ligament in the knee. It requires a significant amount of force or energy to cause it to tear. Pcl tears are far less common than anterior cruciate ligament (acl) tears.

Accidents and falls: Pcl injuries are typically caused by knee dislocations, car accidents when the knee hits a dashboard, and falls directly onto the bent knee. Anything that would case the leg (tibia) to move backwards from a directly blow could cause a PCL injury.