A femoral-side hip-joint prosthetic device for use in hip-joint replacement. The device includes an elongate stem whose surface defines maximally spaced infero-medial and supero-lateral surface curves, and which is characterized by a surface rotation which carries the supero-lateral surface curve about 15 DEG -30 DEG forward with respect to the infero-medial surface curve, on progressing upward along the upper surface portion of the stem, with the device in operative position. The rotation of the stem surface produces a close approximation to the cavity formed in the proximal femur by removal of the cancellous bone in the natural cavity formed by a wall of densified cancellous bone. A 3 DEG -15 DEG proximal anteversion of the neck is adapted to place a hip-joint ball carried on the stem at a position closely approximating that of the head in the natural femur. In the method of the invention, the cavity which receives the prosthesis stem is formed by a rasp/broach-type tool whose surface conforms closely to that of the stem.
申请公布号
US4895573(A)
申请公布日期
1990.01.23
申请号
US19880172026
申请日期
1988.03.23
申请人
HARRINGTON ARTHRITIS RESEARCH CENTER
发明人
KOENEMAN, JAMES B.;LONGO, JOSEPH A.;JOHNSON, ROGER H.;HANSEN, THOMAS M.;WEINSTEIN, ALLAN M.;MURRAY, THOMAS P.