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Expandable ring intervertebral fusion device

  • US 9,615,933 B2
  • Filed: 09/15/2009
  • Issued: 04/11/2017
  • Est. Priority Date: 09/15/2009
  • Status: Active Grant
First Claim
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1. An intervertebral fusion device for supporting a disc space, comprising:

  • a) a substantially semicircular array of rings having a first unexpanded state and a second expanded, locked state,wherein each ring in its expanded, locked state has a diameter corresponding substantially to a height of the disc space,wherein each ring has an outer diameter, an inner diameter, and a thickness therebetween, andwherein each ring has first and second opposed sets of gripping teeth that extend outward from the expanded ring, wherein the gripping teeth are adapted for gripping opposing endplates of vertebral bodies adjacent the disc space,wherein the teeth point substantially perpendicularly to their respective rings in the plane of their respective ring.

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