An interbody spinal fusion implant made of a material other than bone adapted for placement across an intervertebral space formed across the height of a disc space between two adjacent vertebral bodies. The implant has a leading end that is curved to form a portion of a circle from side to side, sides...http://www.google.ca/patents/US20090270991?utm_source=gb-gplus-sharePatent US20090270991 - Spinal fusion implant with bone screws