Patent ID: 8303663
Filing Date: 2012-11-06
Classification: A61B,A61F,F16H,H05K,Y10T

Abstract:
1. A distractible intervertebral body fusion device adapted for implantation into an intervertebral disc space of a patient, comprising: a first bearing surface configured to interface with an end plate of a superior vertebra of the intervertebral disc space; a second bearing surface configured to interface with an end plate of an inferior vertebra of the intervertebral disc space; and at least one coaxial screw gear sleeve mechanism disposed between the first bearing surface and the second bearing surface, the coaxial screw gear sleeve mechanism including: such that selective operation of the drive mechanism causes a distraction of the first bearing surface and the second bearing surface with respect to the superior vertebra and the inferior vertebra of the intervertebral disc space due to a telescoping expansion resulting from the sleeve translating relative to one of the first bearing surface and the second bearing surface simultaneously with the post translating relative to the sleeve.