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Device and method for lumbar interbody fusion

  • US 6,730,126 B2
  • Filed: 02/12/2003
  • Issued: 05/04/2004
  • Est. Priority Date: 11/13/2000
  • Status: Expired due to Fees
First Claim
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1. An expandible intervertebral disc spacer, comprising:

  • a split cylinder having a top half and a bottom half joined by a plurality of pins to permit movement of the top half with respect to the bottom half, an inner surface of the top half and an inner surface of the bottom half facing each other defining a tapered bore extending from a first end of the cylinder towards a second end of the cylinder; and

    a piston screw insertable into the tapered bore to expand the cylinder by moving the top half away from the bottom half;

    wherein the piston screw moving into the taperd bore causes the second end of the cylinder to expand a greater distance than the first end.

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