Radiovisible hydrogel intervertebral disc nucleus
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United States of America Patent
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Jun 12, 2012
Grant Date -
Dec 1, 2005
app pub date -
Jul 12, 2005
filing date -
Sep 16, 2002
priority date (Note) -
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Abstract
A spinal implant for replacing the natural nucleus of the disc made from a polymer such as hydrogel having a radiopaque material located within the polymer. The material may be in the form of a powder dispersed throughout the polymer or may be in he form of a powder dispersed in layers or in other specific locations within the polymer. The radiopaque material is metal such as gold, tungsten, titanium, tantalum or platinum. The metal may also be in the form of a foil or wire located within the hydrogel such as polyurethane, thereby making the implant visible on x-rays. Other polymers besides hydrogel may be used with the radiopaque material being dispersed therein.
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