Artificial joint fixation to bone

摘要

A joint prosthesis for fixation to the bone having a joint motion element and a stem attached thereto and extending into the central canal of the bone into which the prosthesis is to be fixed. That part of the prosthesis at the end of the bone located near the joint motion element defining an external geometric pattern of elongated projections spaced circumferentially around the prosthesis which engages with the bone when implanted thereby establishing a tight fit between the prosthesis and the bone.