Universal joint prosthesis

Details Universal joint prosthesis Universal joint prosthesis

1995-03-30

1996-08-27

Isabella, David

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

Implantable prosthesis

Bone

623 18, A61F 232

Patent

active

055497047

ABSTRACT:
The universal joint prosthesis has a cap which has an outer shell, an inner shell, a calotte-shaped, smooth outer surface formed by the outer shell and an inner surface formed by the inner shell and having projections distributed along the circumference. At least some projections have undercuts and/or are provided with through holes. The outer material forming the outer shell has, with the same surface characteristics, a smaller coefficient of friction than the inner material forming the inner shell. On the other hand, the inner material permits a firmer bond with a bone than the outer material. The universal joint prosthesis also has perforated sleeves projecting from the cap. The universal joint prothesis can usually be attached firmly to a bone without a binder, the undercuts and/or holes helping to provide a permanent connection between the cap and the bone.

REFERENCES:
patent: 4752296 (1988-06-01), Buechel et al.
patent: 4865603 (1989-09-01), Noiles
patent: 5002579 (1991-03-01), Copf et al.
patent: 5080679 (1992-01-01), Pratt et al.
patent: 5108435 (1952-04-01), Gustavson et al.
patent: 5236459 (1993-08-01), Koch et al.

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