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Lateral expandable interbody fusion cage

  • US 7,951,199 B2
  • Filed: 06/15/2005
  • Issued: 05/31/2011
  • Est. Priority Date: 06/15/2005
  • Status: Expired due to Fees
First Claim
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1. A laterally expandable interbody fusion cage comprising:

  • a. an outer cage having a first inner space defined by the walls of the outer cage;

    b. at least one inner cage, said at least one inner cage initially being substantially completely inside the first inner space of said outer cage and adapted and constructed to be expanded laterally outwardly from said first inner space in said outer cage;

    c. each of said at least one inner cage having a second inner space defined by walls of each inner cage said inner space being configured to receive graft material;

    d. wherein said at least one inner cage and said outer cage have substantially the same configuration; and

    e. wherein the second inner space in said at least one inner cage is filled with bone graft material prior to expansion, and the first inner space in said outer cage is filled with bone graft material following expansion.

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