Patent ID: 7674297

Claim:
A spinal fusion system, comprising: a cage structure including a posterior wall and opposing lateral sidewalk defining a fillable volume; the cage structure having a convex, dome-shaped superior surface and a substantially flat interior surface when viewed from the side; a removable locking anterior gate, enabling the fillable volume to be packed with graft, biologic or other materials after the cage structure is inserted within an intervertebral space prior to the gate being closed and locked; the system including a plurality of the cage structures, each with an anterior height, a posterior height, and a locking gate; including cages wherein the anterior height is greater than the posterior height, resulting in structures that are trapezoidally shaped when viewed from the side; and including cages which are larger and more trapezoidally-pronounced as compared to other of the cages for L5-S1 spinal levels.