Selectively expandable composite structures for spinal arthroplasty
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United States of America Patent
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-
Aug 25, 2009
Grant Date -
Jun 14, 2007
app pub date -
Feb 26, 2007
filing date -
Apr 25, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Embodiments include selectively expandable composite structures useful as spinal arthroplasty devices such as intervertebral disc prostheses. The structures may comprise an outer shell comprised of a non-hydrogel polymer material. The structures also may comprise at least one core positioned within the outer shell. The core may be comprised of a hydrophilic polymer. The core may expand upon hydration, thereby deforming the outer shell. The selectively expandable composite structures may be implanted in a dehydrated form and then expand during re-hydration following implantation.
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Family
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