Total knee-joint prosthesis - has parts forming linkage polygon to give motion resembling motion of natural knee throughout full range of bending

摘要

Total knee-joint prosthesis has rigid, positively connected operating elements (levers, connector plates, toothed segments etc) to form a linkage polygon which is under load during the whole course of motion and is connected to the femur or tibia by webs and coupling pieces. Pref. the crossing arms of the polygon are remodelled bodily and jointed to the web and coupling which have rolling surfaces whose generatrices are the polar curves for natural motion of the knee joint and which are connected tangentially to the their surface and positively pref. by teeth. The motion properties are the same as for a natural knee enabling the patient to walk naturally.