Patent ID: 8100980

Claim:
An artificial elbow joint for replacing an elbow joint, comprising: a humeral component made of metal; and an ulnar component made of resins; wherein the humeral component is comprised of a substantially cylindrical trochlea and a stem that extends from said trochlea and is inserted in a humerus; the ulnar component is comprised of a joint surface member that faces the trochlea and a stem that extends from said joint surface member and is inserted into an ulna, said joint surface member facing said trochlea being provided in a center part thereof with a shallow concave surface which is substantially half-cylindrical in shape so as to rotatably contact a surface of the substantially cylindrical trochlea while being unconstrained thereto; the stem of the humeral component, when seen in a top plan view, is provided to incline so that the interior angle becomes acute with respect to a centerline of the trochlea, and when seen in a side elevational view, is made to curved gently downward so as to comply with a lordotic shape of the humerus; and the trochlea is provided so as to be turnable about a center longitudinal axis of the stem, so that an angle with respect to a horizontal plane passing through the centerline is adjusted and fixed.