An intervertebral implant for implantation between an upper vertebral body and a lower vertebral body is disclosed. It includes a body portion and a plate that is removably attachable to the body portion. A first and second pathway pass through the plate. A first arcuate anchor is movable in an arcuate path through the first pathway and a second arcuate anchor is movable in an arcuate path through the second pathway. A locking member is movable between an open position and a closed position to either block or allow the withdrawal of the first and second arcuate anchors.