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Hydrogel bead intervertebral disc nucleus

  • US 5,192,326 A
  • Filed: 09/09/1991
  • Issued: 03/09/1993
  • Est. Priority Date: 12/21/1990
  • Status: Expired due to Term
First Claim
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1. A prosthetic nucleus for implanting in the disc space after the removal of the degenerated or damaged nucleus of an intervertebral disc comprising:

  • A multiplicity of hydrogel beads having a water content of at least 30%; and

    a flexible semi-permeable cover surrounding said hydrogel beads.

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  • 7 Assignments
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