Patent ID: 7455692

Claim:
A pair of artificial interbody spinal implants for insertion at least in part into the same implantation space formed across the height of a disc space between adjacent vertebral bodies of a human spine, the vertebral bodies having an anterior aspect and a posterior aspect and a depth therebetween, each of said implants comprising: a leading end for insertion first into the disc space, a trailing end opposite said leading end, length from said leading end to said trailing end, and a mid-longitudinal axis along the length; opposed upper and lower portions between said leading and trailing ends adapted to be placed at least in part within and across the height of the disc space to contact and support the adjacent vertebral bodies, said upper and lower portions defining a height of each of said implants, said upper and lower portions being non-arcuate along at least a portion of the length of each of said implants; and opposite sides between said upper portion and said lower portion, and between said leading and trailing ends, said opposite sides defining a width of each of said implants, each of said opposite sides being at least in part straight along at least a portion of the length of said implant, said leading end being curved to form one quarter of a circle from one of said opposite sides across the mid-longitudinal axis to another one of said opposite sides, the circle having a radius equal to the width of each of said implants; each of said implants being manufactured from a material other than bone, said upper and lower portions of each of said implants including at least one opening in communication with one another for permitting for the growth of bone from vertebral body to vertebral body through each of said implants; said leading ends of said implants forming one half of the same circle when inserted into the same implantation space and positioned side-by-side.