Endoprosthetic knee joint device

Details Endoprosthetic knee joint device Endoprosthetic knee joint device

1996-12-31

1999-02-16

Isabella, David

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

Implantable prosthesis

Bone

A61F 238

Patent

active

058715428

ABSTRACT:
The invention concerns endoprosthetic knee joint devices of the so called `meniscal knee`variety.
A device is provided of the above type wherein the mutually engaging bearing surfaces of the tibial platform and the meniscal component have a part-cylindrical shaping to allow rotation therebetween about an antero-posterior axis, the superior bearing surface of the tibial platform preferably being convex.
Movements of the natural joint can still be closely simulated and full congruency can be retained throughout the natural range of movement, but there is an additional degree of restraint at the tibio-meniscal interface. Unrestricted antero-posterior relative movement is allowed, as in the conventional meniscal knee, but the part-cylindrical interface shaping serves to reduce the risk of lateral or medial dislocation.

REFERENCES:
patent: 4224696 (1980-09-01), Murray et al.
patent: 4586933 (1986-05-01), Shojl et al.
patent: 4838891 (1989-06-01), Branemark et al.
patent: 5064437 (1991-11-01), Stock et al.
patent: 5092895 (1992-03-01), Albrektsson et al.

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