[Surgical treatment of the congenital femural defect by means of rotation plasty (author's transl)].

Experiences made in 5 cases with Borggreve's rotation plasty have shown that in cases of congenital femural defects and exceptionally also in malignant bone tumors of the distal femur this method should be suggested to the patient as a possible therapy. By rotating and shortening of the leg, the ankle joint is converted to a new knee joint. With this method an active movement of the knee joint can be obtained, so that the fitting with a below knee prosthesis becomes possible.