This model clearly demonstrates abductions, anteversion, retroversion, internal and external rotation. This knee joint model also clearly defines the ACL and PCL. The colour of the natural-cast bones of the knee joint is extremely realistic. The cartilage on the knee joint surfaces is marked blue. This model consists of portions of the femur, tibia and fibula, menisci and patella. The Functional knee joint model is mounted on a base for easy display.