ZERO PROFILE SPINAL FUSION CAGE

摘要

An interbody fusion cage having upper and lower canals for receiving the heads of bone screws that have been pre-installed in opposing vertebral body endplates. The proximal wall of the cage preferably has a vertical slot that communicates with each canal and is adapted to allow access by a screwdriver and tightening of the screws.

主权项

1. An intervertebral fusion device comprising:
a first component having i) a proximal endface, ii) a distal endface, iii) a first outer surface that extends between the proximal and distal endfaces and positioned and configured to contact a vertebral endplate, iv) a through hole that extends through the first outer surface and adapted to promote vertebral fusion through the first component, and v) a first translation surface extending along a proximal-distal direction and oriented at an angle to the first outer surface; a rail component having i) a proximal end, ii) a distal end, iii) a second outer surface that extends between the proximal and distal ends, iv) a hole extending distally from an opening in the proximal end, and v) a second translation surface extending along the proximal-distal direction and oriented at an angle to the second outer surface; and a threaded screw disposed within the hole of the rail component, wherein the first and second translation surfaces are translatable upon each other along the proximal-distal direction, and wherein the first and second outer surfaces are substantially coplanar.