Patent ID: 8632595

Claim:
An apparatus comprising: a first ramped endplate for an intervertebral implant having a first end and a second end, the ramped endplate comprising: an upper surface; a lower surface; a first side portion extending from the lower surface and connecting the first end and the second end, the first side portion comprising a first ramped surface proximate the first end, and a second ramped surface proximate the second end; and a second side portion extending from the lower surface and connecting the first end and the second end, the second side portion comprising a first ramped surface proximate the first end, and a second ramped surface proximate the second end; wherein at least one of the first side portion and the second side portion includes first, second and third protuberances aligned along a longitudinal length of the side portion, whereby the first and second protuberances form a first slot and the second and third protuberances form a second slot; a second ramped endplate for the intervertebral implant, the second ramped endplate having a first end and a second end, the second ramped endplate comprising: an upper surface; a lower surface; a first side portion extending from the lower surface and connecting the first end and the second end, the first side portion comprising a first ramped surface proximate the first end, and a second ramped surface proximate the second end; and a second side portion extending from the lower surface and connecting the first end and the second end, the second side portion comprising a first ramped surface proximate the first end, and a second ramped surface proximate the second end; wherein the first end of the first ramped endplate overlaps the second end of the second ramped endplate; wherein the first end of the second ramped endplate overlaps the second end of the first ramped endplate; wherein at least one of the first side portion and the second side portion of the second ramped endplate includes first, second and third protuberances aligned along a longitudinal length of the side portion, whereby the first and second protuberances form a third slot and the second and third protuberances form a fourth slot; and a central ramp for the intervertebral implant, wherein the central ramp is disposed between the first ramped endplate and the second ramped endplate, the central ramp comprising a first protuberance engaged with the first slot, a second protuberance engaged with the second slot, a third protuberance engaged with the third slot and a fourth protuberance engaged with the fourth slot.