Artificial joint

Details Artificial joint Artificial joint

1993-02-09

1996-09-17

Jones, Mary Beth

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

623 18, A61F 238

Patent

active

055564321

ABSTRACT:
Artificial joint, in particular an endoprothesis for the human knee joint, consisting of at least two joint parts moving with respect to each other, a joint head and a joint base, with toroidal joint surfaces, that have function surfaces with differing circular intersection contours in mutually perpendicular planes--a longitudinal plane and a transverse plane--whereby the curve ratios of the function surfaces are defined in each of the planes as either convex--convex, convex-concave, or concave--concave, and the joint geometry of the function areas to each other in each of the two planes is determined by a link chain with two link axes (dimeric link chain), which proceed through the rotation centers of the function areas with the radii of the attendant intersection contours, respectively.

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patent: 3916451 (1975-11-01), Buechel
patent: 4003095 (1977-01-01), Gristina
patent: 4224696 (1980-09-01), Murray
patent: 4293963 (1981-10-01), Gold et al.
patent: 4808185 (1989-02-01), Penenberg et al.
patent: 5064437 (1991-11-01), Stock et al.
patent: 5197986 (1993-03-01), Mikhail

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