Acetabular cup having optionally removable portions

Details Acetabular cup having optionally removable portions Acetabular cup having optionally removable portions

1993-06-17

1994-12-06

Green, Randall L.

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

Implantable prosthesis

Bone

606 91, 606 92, 606 95, A61F 232

Patent

active

053707028

ABSTRACT:
An acetabular cup having optionally removable portions to permit a choice between methods of affixation is provided. The cup has recesses in the surface of the wall of the cup. A post extends from the base of the recess inwardly toward the interior of the cup, but does not extend past the inner surface of the wall into the interior of the cup. A very thin annular section of the wall remains at the base of the recess. To open a hole, a tool is used to grasp and pull the post. The pulling force applied to the post causes the wall at the annular section to break or tear. The base and post is removed and a hole remains through which a fastener can be inserted. The hole or recess is configured to receive a standard bone screw, but may be configured to complement the shape of the head of any desired bone fastener.

REFERENCES:
patent: 4563778 (1986-01-01), Roche et al.
patent: 4566138 (1986-01-01), Lewis et al.
patent: 4955325 (1990-09-01), Zarnowski et al.
patent: 4955919 (1990-09-01), Pappas et al.

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