Patent ID: 8231679

Claim:
A prosthesis comprising: a first component comprising: a bone-engaging surface; an outer surface that is not bone-engaging; and a fastener-receiving hole extending through the bone-engaging surface and the outer surface; wherein the bone-engaging surface is configured to engage a portion of a surface of a first vertebral body, wherein the first vertebral body has been configured to engage with the bone-engaging surface, and wherein after the first component is engaged with the first vertebral body, at least at a location of an area of a junction between a vertical surface and an endplate surface of the first vertebral body, the outer surface of the first component has a shape that is substantially similar to an anatomical shape of the first vertebral body a second component comprising: a bone-engaging surface; an outer surface that is not bone-engaging; and a fastener-receiving hole extending through the bone-engaging surface and the outer surface; wherein the bone-engaging surface is configured to engage a portion of a surface of a second vertebral body, wherein the second vertebral body has been configured to engage with the bone-engaging surface, and wherein after the second component is engaged with the second vertebral body, at least at a location of an area of a junction between a vertical surface and an endplate surface of the second vertebral body, the outer surface of the second component has a shape that is substantially similar to an anatomical shape of the second vertebral body.