Patent ID: 8764832

Claim:
An intervertebral implant comprising: a body having a generally rounded exterior shape for promoting fusion between an inferior vertebral body and a superior vertebral body, wherein the body comprises: a generally rounded first rim defining a periphery of the implant and including a central aperture, an upper surface configured to face one of the inferior vertebral body and the superior vertebral body and a lower surface opposite the upper surface, the first rim having a detectable radiographic signature; and a member comprising a top surface coupled directly to the lower surface of the first rim, the member being made from a first material having less of a radiographic signature than the first rim, the member having a generally half-moon shaped cross-sectional configuration and being coupled directly to the first rim in a manner such that the member does not obstruct a passageway defined by the central aperture, wherein the member includes an anterior support and a posterior support, the supports each having a radiographic signature greater than that of the first material, the supports being positioned such that the posterior support blocks radiographic visualization of the anterior support when the implant is radiographically viewed from a posterior side of the implant, wherein the member adds vertebral spacing height to the first rim.