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Intervertebral implant

  • US 9,522,070 B2
  • Filed: 03/07/2013
  • Issued: 12/20/2016
  • Est. Priority Date: 03/07/2013
  • Status: Active Grant
First Claim
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1. An adjustable spinal fusion intervertebral implant comprising:

  • upper and lower body portions each having proximal and distal surfaces at proximal and distal ends thereof, the proximal and distal surfaces of the upper and lower body portions generally facing each other;

    a proximal wedge member disposed at the proximal ends of the respective ones of the upper and lower body portions;

    a distal wedge member disposed at the distal ends of the respective ones of the upper and lower body portions;

    first and second linkages each connected to and rotatable relative to the upper and lower body portions; and

    an actuator shaft received between the upper and lower body portions, the actuator shaft extending along a first axis, the actuator shaft extending intermediate the distal and proximal wedge members, wherein rotation of the actuator shaft causes the distal and proximal wedge members to be drawn together such that longitudinal movement of the distal wedge member against the distal surfaces and the longitudinal movement of the proximal wedge member against the proximal surfaces causes separation of the upper and lower body portions and rotation of the first linkage and the second linkage about a second axis perpendicular to the first axis,wherein the upper body portion further comprises an upper first side portion and an upper second side portion, each having an upper separation edge closest to the lower body portion, wherein the lower body portion further comprises a lower first side portion and a lower second side portion, each having a lower separation edge closest to the upper body portion, wherein the upper separation edges and the lower separation edges are separated along a third axis, perpendicular to both the first and second axis, when the actuator causes separation of the upper and lower body portions such that the upper first and second side portions do not overlap with the lower first and second side portions when the implant is in an expanded state.

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