Semi-constrained artificial joint

Details Semi-constrained artificial joint Semi-constrained artificial joint

1984-02-09

1987-01-06

Apley, Richard J.

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

Implantable prosthesis

Bone

A61F 238

Patent

active

046344446

ABSTRACT:
An artificial joint having stepped convex and concave bearing surfaces is provided. The stepped configuration prevents the bearing surfaces from sliding past one another along their axis of rotation and thus stabilizes the joint against lateral dislocations. In certain preferred embodiments, the stepped bearing surfaces faces are employed in an artificial knee joint and the joint is further stabilized against dislocations corresponding to the femur moving anteriorly with respect to the tibia.

REFERENCES:
patent: 3816853 (1974-06-01), Elson
patent: 3848276 (1974-11-01), Martinez
patent: 3953899 (1976-05-01), Charnley
patent: 3996624 (1976-12-01), Noiles
patent: 4209861 (1980-07-01), Walker et al.
patent: 4219893 (1980-09-01), Noiles
patent: 4301553 (1981-11-01), Noiles

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