Acetabular cup with shiftable elevated rim liner

Details Acetabular cup with shiftable elevated rim liner Acetabular cup with shiftable elevated rim liner

1992-02-18

1992-12-15

Isabella, David

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

Implantable prosthesis

Bone

A61F 234

Patent

active

051712857

ABSTRACT:
The acetabular cup assembly of this invention includes a bearing component having an elevated rim and a metal cup. A groove is formed about the component for engagement with a locking ring carried by the metal cup. The bearing component may be inserted into the cup and tilted or tipped so that the elevated rim is pressed downwardly against the rim of the metal cup. In this position, the elevated portion of the rim is out of the way of the surgeon permitting the head to be more easily inserted into the bearing component. Once the head is seated the surgeon presses against the raised lip of the bearing component to shift the bearing component such that the elevated lip is properly positioned. A snap ring locks into a groove of the bearing component when positioned for use.
Accordingly, it is an obejct of the invention to provide a novel acetabular hip cup assembly.
Another object of the invention is to provide an acetabular hip cup assembly wherein the bearing component may be shifted to place the elevated lip in a generally parallel relationship relative to the rim of the metal cup.

REFERENCES:
patent: 4623351 (1986-11-01), Church
patent: 4650491 (1987-03-01), Parchinski
patent: 4678472 (1987-07-01), Noiles
patent: 4695282 (1987-09-01), Forte et al.
patent: 4950299 (1990-08-01), Noiles
patent: 4978356 (1990-12-01), Noiles
patent: 5002577 (1991-03-01), Bolesky et al.
patent: 5049158 (1991-09-01), Engelhardt et al.
patent: 5092897 (1992-03-01), Forte

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