BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective of the disassembled cage of this invention; FIG. 2 is an exploded perspective of a disassembled plate of the spinal implant of FIG. 1; FIG. 3 is a cross section of the assembled implant of this invention; FIG. 4 is a cross section of another embodiment of the assembled implant of this invention; FIG. 5 is a perspective of the embo