Modular acetabular anti-protrusio cage and porous ingrowth cup combination
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United States of America Patent
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-
Jun 21, 2005
Grant Date -
Sep 11, 2003
app pub date -
Jan 23, 2003
filing date -
Jan 25, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A modular acetabular anti-protrusio cage and acetabular cup combination includes an acetabular cup having a bone ingrowth-promoting surface and a shaped anti-protrusio cage having one or more fixation flanges. The acetabular cup is attached to acetabular bone, and the anti-protrusio cage is thereafter mounted to the inner surface of the acetabular cup. Alternatively, the anti-protrusio cage can be mounted to the inner surface of the acetabular cup before the acetabular cup is attached to acetabular bone. The flanges of the anti-protrusio cage are joined to the ilium, ischium and/or pubis to secure the acetabular cup and the anti-protrusio cage to the hip bone and to distribute forces away from the medial wall of the acetabulum. After the cup and the cage are mounted in the patient, a bearing insert is secured within the interior of the anti-protrusio cage, and a prosthetic femoral head is positioned in the bearing insert.
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