ENDOPROSTHESIS OF KNEE JOINT Russian patent published in 1997 - IPC

FIELD: traumatology and orthopedics. SUBSTANCE: invention is designed for total substitution of knee joint, which function has been lost as result of disease or injury. Endoprosthesis consists of tibia and femoral legs which terminate with semi-joints and are hinged with each other through a bushing, stepped screw washer and nut. Femoral leg of endoprosthesis is constructed of two parts with oppositely-wound threads on their ends. The two parts are joined with threaded bushing having inner threads corresponding to parts of femoral leg. There is also outer thread on threaded bushing, on which profile nuts are installed for attaching femoral leg to bone fragment and for thrusting corresponding semi- joint. The latter as well as hinge bushing, threaded bushing, and profile nuts are made of bioinert polymer material. EFFECT: improved design. 2 dwg