Patent ID: 7500991
Filing Date: 2009-03-10
Classification: A61F

Abstract:
1. An intervertebral fusion device comprising: a) an anterior wall and a posterior wall defining a width therebetween, wherein the anterior wall has a convex shape and the posterior wall has a concave shape to define a banana shape adapted for non-linear insertion from a posterior side of a spine, b) first and second end walls between the anterior and posterior walls and defining a length therebetween, and c) an upper bearing surface and a lower bearing surface, each having a midline having a recessed ridge running in the anterior-posterior direction and bisecting a right and left side of the device, c) a internal planar wall extending transversely from the anterior wall to the posterior wall, and from the upper bearing surface to the lower bearing surface, to define first and second graft chambers, wherein the anterior wall has a middle portion, lateral end portions, each having a maximum height, and the maximum height of the middle portion is greater than the maximum height of the lateral end portions, wherein the width of the device is less than the length of the device, and wherein the length is less than ½ a width of a disc space.