Knee joint endoprosthesis

Details Knee joint endoprosthesis Knee joint endoprosthesis

1991-02-11

1991-11-12

Shay, Randy Citrin

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

Implantable prosthesis

Bone

A61F 238

Patent

active

050644378

ABSTRACT:
A knee-jount endoprosthesis including a femoral part (2), a meniscus element (6) and a tibial part (12), the femoral part (2) and the tibial part (12) lying with their bearing surfaces in contact with associated bearing surfaces of the meniscus element (6). This endoprosthesis is capable of achieving the physiological knee-joint functions of movement and load-bearing while preventing local peak stresses, especially those caused by line or point contact. The femoral part (2) is provided with a spherical bearing surface (4) which lies on a corresponding spherical and concentrically disposed bearing surface (8) of the meniscus element (6). The tibial part (12) has a convex configuration and a cylindrical bearing surface which contacts a mating, coaxially arranged second bearing surface (10) on the meniscus element (6).

REFERENCES:
patent: 4016606 (1977-04-01), Murray et al.
patent: 4085466 (1978-04-01), Goodfellow et al.
patent: 4224696 (1980-09-01), Murray et al.

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