Artificial intervertebral disc replacements incorporating reinforced wall sections
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United States of America Patent
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Apr 10, 2007
Issued Date -
N/A
app pub date -
Apr 4, 2003
filing date -
Oct 8, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An Artificial Disc Replacement (ADR) includes a body and/or outer wall that is fortified, reinforced, stiffened or otherwise strengthened with a higher durometer, for example, where it rests against a weakened or deficient area of the annulus fibrosis (AF). The 'less stiff' portions facilitate the transfer of load to the healthier portion of the AF. A hydrogel or other compressible and/or resilient material may be used within the center of the ADR to selectively transfer the forces to the outer wall. The outer wall may constructed of an elastomer, and may include a radial ply, bias ply, and/or belted construction. Methods of determining a properly sized ADR are also disclosed.
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