Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1988-05-26
1989-05-30
Apley, Richard J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 20, 623 23, A61F 230, A61F 238, A61F 232
Patent
active
048347582
ABSTRACT:
A bone prosthesis for the leg and thigh comprises a distal femoral component that includes a body portion adapted to replace a resected portion of the distal femur and a condylar portion having a spherical surface along its inferior and posterior aspects and an axle hole extending through it in the latero-medial direction at the geometric center of the sperical surface and a proximal tibial component that includes a metal head portion having a cavity opening superiorly and defined by spaced-apart lateral and medial flange portions, each of which has an axle hole. A plastic tibial plateau insert is received in the cavity of the tibial head portion and has a spherical seat matching, receiving and pivotably supporting the femoral condylar spherical surface. A plastic bushing is received in the axle hole of each tibial flange portion, and a metal axle is received in the femoral and tibial axle holes. Clearances between the bushings and the portions of the axle received in the bushings provide latero-medial flexural and axial rotational laxities in the prosthetic joint throughout the range of flexural motion. A shaft component is used interchangeably to replace portions of the tibial and femoral shafts. A diaphysis component is provided or total femoral replacement. A proximal femoral component, used in conjunction with the shaft component or diaphysis component, replaces the femoral part of the hip joint. Identical Morse-type taper couplings are used to connect shaft components to joint components.
REFERENCES:
patent: 3696446 (1972-10-01), Bousquet et al.
patent: 3765033 (1973-10-01), Goldberg et al.
patent: 3824630 (1974-07-01), Johnston
patent: 3837009 (1974-09-01), Walker
patent: 3886601 (1975-06-01), Findlay
patent: 3996624 (1976-12-01), Noiles
patent: 4112522 (1978-09-01), Dadurian et al.
patent: 4301553 (1981-11-01), Noiles
patent: 4538305 (1985-09-01), Engelbrecht et al.
patent: 4764171 (1988-08-01), Harder et al.
Burstein Albert H.
Lane Joseph M.
Otis James C.
Wright Timothy M.
Apley Richard J.
Isabella David J.
New York Society for the Relief of the Ruptured and Crippled
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