Patent ID: 8591586

Claim:
An intervertebral disc prosthesis, comprising: a first cover plate having a first outer face for connection to a first vertebral body and a first inner face forming a concavely rounded slide surface and configured with a dorsal edge, a ventral edge, and lateral edges defining a first circumferential perimeter having a generally rectangular shape with rounded corners, wherein the first outer face of the first cover plate is configured with a first connection surface that extends at least partially between the first circumferential perimeter, wherein the first circumferential perimeter extends beyond the first connection surface with a first set-back portion configured with a first inclined transition surface that adjoins the first connection surface and the first circumferential perimeter, wherein the first inclined transition surface is located at dorsolateral corners of the first outer surface of the first cover plate when implanted in an anterior to posterior direction of implantation; a second cover plate having a second outer face for connection to a second vertebral body, and a second inner face forming a seat and configured with a dorsal edge, a ventral edge, and lateral edges defining a second circumferential perimeter having a generally rectangular shape with rounded corners, wherein the second outer face of the second cover plate is configured with a second connection surface that extends at least partially between the second circumferential perimeter, wherein the second circumferential perimeter extends beyond the second connection surface with a second set-back portion configured with a second inclined transition surface that adjoins the second connection surface and the second circumferential perimeter, wherein the second inclined transition surface is located at dorsolateral corners of the second outer surface of the second cover plate when implanted in an anterior to posterior direction on implantation; and a prosthesis core mounted on the second inner face of the second cover plate by the seat, the prosthesis core having a first face that is convexly rounded and together with the first inner face of the first cover plate, forms a spherical slide surface, wherein the spherical slide surface extends to the edges of the first and second circumferential perimeter of the first and second cover plate.