Two-part prosthetic nucleus replacement for surgical reconstruction of intervertebral discs
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United States of America Patent
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N/A
Issued Date -
Sep 18, 2003
app pub date -
Mar 13, 2002
filing date -
Mar 13, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A prosthetic nucleus replacement comprises a modular two-part body formed into an oval disk. The top part has a domed surface with a crest and is made of a high molecular weight polyethylene or ceramic. The bottom part is made of biocompatible metal like titanium and locks into an underlying vertebrae with a peg or brace molding that extends down into a socket. The prosthetic nucleus replacement is surgically implanted into the hollowed out intervertebral space through a flap cut in the natural annulus fibrosis. The lower vertebra is prepared to receive the peg by clearing the material covering the top of the bone matrix. Bone cement is used around the peg to ensure a tight fit and immobile attachment of the disc to the lower vertebrae.
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