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Spinal mobility preservation apparatus having an expandable membrane

  • US 20050149191A1
  • Filed: 10/22/2004
  • Published: 07/07/2005
  • Est. Priority Date: 02/16/2000
  • Status: Active Grant
First Claim
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1. An implantable spinal mobility preservation apparatus, comprising:

  • a intermediate body having a proximal end and a distal end and including at least one flexible element positioned between the proximal and the distal end;

    a proximal body including a first retention structure secured to the proximal end of the intermediate body and defining a proximal lumen;

    a distal body including a second retention structure secured to the distal end of the intermediate body; and

    an expandable membrane secured over at least a portion of the intermediate body.

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