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Spinal fusion cage with lordosis correction

  • US 20020128713A1
  • Filed: 05/15/2002
  • Published: 09/12/2002
  • Est. Priority Date: 08/13/1999
  • Status: Active Grant
First Claim
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1. An intervertebral cage, comprising:

  • a rigid frame having anterior and posterior portions, superior and inferior surfaces, and two substantially open sides;

    the thickness of the cage between the superior and inferior surfaces in the anterior portion defining an anterior height, and the thickness of the cage between the superior and inferior surfaces in the posterior portion defining a posterior height;

    the cage having a compressed state associated with insertion of the cage into an intervertebral space, wherein the anterior height is less than or equal to the posterior height, and an expanded state, wherein the anterior height is greater than the posterior height to account for lordosis; and

    means for locking the cage into the expanded state once the cage is positioned within the intervertebral space.

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