Patent ID: 8343220

Claim:
An interbody spinal fusion implant for insertion across a disc space between two adjacent vertebral bodies of a human spine, said implant comprising: a leading end, a trailing end opposite said leading end and a length therebetween; a hollow interior; opposite arcuate portions adapted for placement toward and at least in part within the adjacent vertebral bodies and having a distance therebetween defining an implant height greater than the normal height of the disc space, each of said opposite arcuate portions having at least one opening communicating with one another and said hollow interior; at least a portion of a thread formed on the exterior of each of said opposite arcuate portions for penetrably engaging the adjacent vertebral bodies; a leading support wall connecting said opposite arcuate portions at said leading end; a trailing support wall connecting said opposite arcuate portions at said trailing end; and a lateral side and a medial side opposite said lateral side, said lateral side including a side support wall connecting said opposite arcuate portions, said medial side including an opening extending from one of said opposite arcuate portions to the other of said opposite arcuate portions and extending from said leading support wall to said trailing support wall along a majority of the length of said implant, each of said arcuate portions terminating at an edge at said medial side, said opening in said medial side having a height in a plane perpendicular to the length of said implant, said edges being spaced apart a distance equal to the height of said opening in said medial side, said arcuate portions each having a surface from said edge to said hollow interior at said opening on said medial side, each of said surfaces being curved from said edge to said hollow interior in the plane perpendicular to the length of said implant.