Abstract
The posterior cruciate ligament (PCL) is the strongest and largest ligament in the knee and functions as the primary posterior stabilizer. It is mainly comprised of the posteromedial bundle (PMB) and anterolateral bundle (ALB), which work together in both flexion and extension to prevent posterior translation of the tibia relative to the femur. In addition to these two bundles, the menisco femoral ligament acts as a third source to resist posterior translation. In addition to these three components providing stability to posterior directed forces, they also provide significant secondary backup for posterior lateral rotation. It is estimated that the age and sex-adjusted annual incidence of isolated complete PCL tears in the United States is 1.8 per 100,000. However, injury to the PCL typically occurs in conjunction with other ligamentous, meniscal, and chondral injuries (up to 95%).