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EXPANDABLE INTERVERTEBRAL IMPLANT

  • US 20110035011A1
  • Filed: 04/03/2009
  • Published: 02/10/2011
  • Est. Priority Date: 04/05/2008
  • Status: Active Grant
First Claim
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1. An expandable intervertebral implant insertable into an intervertebral disc space and expandable from an initial position to an expanded position, the expandable intervertebral implant comprising:

  • a linkage that includes a plurality of links connected in a longitudinal direction, each link comprising;

    an outer sleeve including a first outer sleeve portion and a second outer sleeve portion that is movable with respect to the first outer sleeve portion, wherein the second outer sleeve portion defines a first engagement surface that is sloped with respect to the longitudinal direction;

    an inner core disposed between the first and second outer sleeve portions, the inner core defining a second engagement surface that is sloped with respect to the longitudinal direction and abuts the first engagement surface;

    wherein relative movement between the inner core and the second outer sleeve portion along the longitudinal direction causes the first engagement surface to ride along the second engagement surface, thereby causing the second outer sleeve portion to deflect away from the first outer sleeve portion in a direction substantially perpendicular to the longitudinal direction.

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