The present invention is directed to a variety of interbody spinal fusion implants for insertion across the surgically corrected height of a disc space between two adjacent vertebral bodies of a human spine. The spinal fusion implants of the present invention have opposed upper and lower portions with openings extending through the implant to provide for bone growth from vertebral body to vertebral body. The upper and lower portions of the spinal fusion implants of the present invention have bone engaging projections to engage the implants to the adjacent vertebral bodies.
