How serious is a posterior cruciate ligament tear?

PCL tear. An isolated PCL tear depending on degree can allow a person to function fairly well. A high grade or complete PCL may hasten patello-femoral arthritis. Often time a PCL tear is associated with posterolateral (pl) or posteromedial (pm) instability which warrants PCL reconstruction with pl or pm reconstruction.
It serious. While a posterior cruciate ligament injury generally causes less pain, disability and knee instability than does an acl tear, it can still sideline you for several weeks or months.