Patent ID: 8506632

Claim:
An intervertebral implant, capable of allowing immobilization of one vertebra in relation to another vertebra, the vertebrae having respective vertebral plates, the implant comprising: two lateral walls essentially parallel to each other; the lateral walls being, when the implant is positioned between the vertebrae, perpendicular to the respective vertebral plates; at least one transverse wall connecting the lateral walls to each other; a dimension of the at least one transverse wall being wide enough to place the lateral walls immediately adjacent to unci of an underlying vertebrae on which the implant is positioned; at least one of the lateral walls having slide prevention reliefs facing outward; and the slide prevention reliefs being configured to bear against an internal surface of the uncus of the underlying vertebra adjacent to the at least one lateral wall, said at least one lateral wall has an inclined flank allowing said lateral wall, after implantation, to come immediately adjacent to the internal surface of the uncus of the underlying vertebra, the inclined flank having the slide prevention reliefs disposed thereon in the form of ribs that extend perpendicularly to a length of the at least one lateral wall.