High precision manufacture of polyurethane products such as spinal disc implants having gradual modulus variation
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United States of America Patent
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app pub date -
Aug 17, 2006
filing date -
Oct 8, 2002
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Abandoned
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Abstract
A process for making a polymeric product having a gradual variation in modulus through at least a portion of the product is disclosed together with an artificial spinal disc formed using the process.
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