This form of dislocation is very infrequent, owing to the thorough manner in which the knee-joint is supported by ligaments. The dislocation is very easily reduced. Long-continued treatment is generally necessary, on account of the extensive injuries done to the soft parts of the surrounding knee. Alternate hot and cold applications are generally required, together with perfect rest of the joint for many weeks. In the majority of cases the integrity of the joint is rarely fully restored. The patient should not attempt to walk upon the limb unless it is supported by a bandage of some sort firmly applied.