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Artificial total lumbar disc for unilateral safe and simple posterior placement in the lumbar spine, and removable bifunctional screw which drives vertical sliding expansile plate expansion, and interplate widening,and angled traction spikes

  • US 20070198089A1
  • Filed: 07/17/2006
  • Published: 08/23/2007
  • Est. Priority Date: 05/13/2004
  • Status: Active Grant
First Claim
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1. A total artificial expansile disc, comprising:

  • at least one pair of substantially parallel plates, that move apart along a first axis, in order to occupy a space defined by vertebral endplates, each of said parallel plates including a first plate and a second sliding plate that moves along a second axis that is perpendicular to the first axis;

    an expansion device, that moves the pair of plates along the first and second axes;

    a core, disposed between the pair of plates, that permits the vertebral endplates to move relative to one another; and

    a limiter which prevents the core from being extruded from between the substantially parallel plates.

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