Patent ID: 7794501
Filing Date: 2010-09-14
Classification: A61F

Abstract:
1. An intervertebral spacer comprising: a first member including a first contact surface to contact an adjacent vertebral body and including a first cylinder formed therein; a second member including a second contact surface and including a second cylinder that is insertable into the first cylinder, said first and second cylinders defining an expansion chamber; a valve for introducing fluid or compressed gas into said expansion chamber to expand said intervertebral spacer; a slot formed in said first member intersecting the first cylinder, said slot defining first and second clamping portions on opposing sides of said slot; a force generating member to apply a clamping force to said first and second clamping portions that is transmitted through the first and second clamping portions to the first cylinder to cause the first cylinder to contract around the second cylinder; and a compressible seal in said slot to contain said fluid or compressed gas in said expansion chamber.