Patent ID: 7875075

Claim:
An intervertebral implant for promoting fusion between adjacent vertebral bodies comprising: a first body made at least in part of a first material, the first body comprising: an inferior laterally extending member having a first anterior aspect and a first posterior aspect separated at least in part by a central void and joined together at least by respective end members, a pair of vertical supports coupled to and extending superiorly away from the inferior laterally extending member and the central void being defined between the pair of vertical supports, and a superior laterally extending member having a second anterior aspect and a second posterior aspect separated at least in part by the central void and joined together by respective second side members, wherein the superior laterally extending member is coupled to the pair of vertical supports; a first horizontal support extending from the first anterior aspect to the first posterior aspect of the inferior laterally extending member, a second horizontal support extending from the first anterior aspect to the first posterior aspect of the inferior laterally extending member, a third horizontal support extending from the second anterior aspect to the second posterior aspect of the superior laterally extending member, a fourth horizontal support extending from the second anterior aspect to the second posterior aspect of the superior laterally extending member, wherein the first and third horizontal supports are aligned with a first vertical support of the pair of vertical supports and the second and fourth horizontal supports are aligned with a second vertical support of the pair of vertical supports, wherein the pair of vertical supports define an anterior access opening and a posterior access opening to the central void, the first and second horizontal supports define an inferior access opening to the central void, and the third and fourth horizontal supports define an superior access opening to the central void; and a second body made at least in part of a second material that is substantially radiolucent, the second body configured to fit in the central void at least partially between the inferior laterally extending member and the superior laterally extending member and at least partially between the pair of supports, wherein the pair of supports are aligned with one another so that one of the supports is obscured by the other of the supports when viewed radiographically from at least one of anterior, posterior, and lateral sides, to indicate a rotational position of the implant about a vertical axis.