This KNEE manufactured by Nacional Ossos for planning and training of orthopedic surgery, with mechanical properties similar to human bone, composed of the distal portion of the LEFT FEMUR, proximal part of the LEFT TIBIA, with the bones having a massive structure, united by simulating the collateral ligaments (lateral and medial) .Ideal for studies, surgical practices and workshop on reconstruction of cruciate ligaments (anterior and posterior), and placement of screws, plates, external fixator and anchors. It allows the orthopedist to have training, very close to the real thing, training himself with respect to Bioethics.