| 摘要 |
An improvement in an acetabular cup component of a prosthetic hip implant in which an acetabular shell receives a bearing member within the interior of the acetabular shell and has at least one bone screw hole, the improvement enabling the interoperative selection of implanting the acetabular shell without the employment of a bone screw or with the employment of at least one bone screw for assisting securement of the acetabular shell within the natural bone at the implant site, the improvement including a plug for seating in the bone screw hole to close the bone screw hole, the plug including a fastener arrangement for engaging the acetabular shell to fasten the plug within the bone screw hole, and a sealing arrangement for engaging the acetabular shell essentially to seal the bone screw hole against the migration of debris from the bearing member through the bone screw hole, the fastener arrangement including an operator arrangement for being selectively operated from the interior of the acetabular shell to selectively release the plug from the bone screw hole for removal of the plug through the interior of the acetabular shell to thereby selectively open the bone screw hole for reception of the bone screw.
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