Joint implant having porous coating for mitigation of wear debris dispersion when implanted
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United States of America Patent
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Feb 24, 2004
Grant Date -
N/A
app pub date -
Sep 29, 1999
filing date -
Sep 29, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Prosthetic joint replacement ensemble includes an artificial joint implant component having a non-bone-interfacing rough surface for ingrowth of fibrous tissue, preferably about a peripheral boundary. The component can be made of metal, and have the rough surface provided by porous metal coating. When the prosthesis is implanted, the extramedullary rough surface engenders ingrowth of soft fibrous tissue so that it forms, as it were, a reconstituted capsular 'bag' in which wear debris from the joint, for example, ultra high molecular weight polyethylene wear debris, is trapped, thus keeping those particles from gaining access to supporting bone at the bone-prosthetic interface. And so, with mitigation of wear debris dispersion, debris wear-induced osteolysis can be ameliorated.
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