Patent ID: 8226652

Claim:
A spinal implant for insertion within an implantation space formed into a segment of adjacent vertebral bodies of a human lumbar spine, said implant comprising: a body having a leading end, a trailing end, a mid-longitudinal axis through said leading and trailing ends, a length parallel to the mid-longitudinal axis, and an arcuate sidewall surrounding the mid-longitudinal axis and extending from said leading end to said trailing end, said body having an interior surface and an opposite exterior surface, said arcuate sidewall having at least two apertures extending therethrough, said apertures being in communication with each other; a first thread extending from said interior surface of said body proximate said trailing end, said first thread having a major diameter; a second thread extending from said interior surface of said body, said second thread being spaced apart from said first thread, said second thread having a major diameter of a different size relative to the major diameter of said first thread; and a third thread extending from said exterior surface of said body, said body having a frustoconical configuration along at least a portion of its length and over a plurality of turns of said third thread about the mid-longitudinal axis.