Patent ID: 9044336
Filing Date: 2015-06-02
Classification: A61F

Abstract:
1. An implantable spinal disk comprising: a monolithic external shell including a pair of sidewalls, back wall, front wall, top wall and bottom wall which define a compartment that extends therebetween in the shell, the top wall having a first opening from exterior of the shell into the compartment, the bottom wall having a second opening from exterior of the shell into the compartment; a first endplate including a first base portion, first top portion and at least one first attachment device, the first base portion having a periphery and defining a first retention surface and a first mating surface opposite the first retention surface, the first mating surface being continuous within the periphery of the first base portion, the first retention surface engaging the top wall to retain the first base portion in the compartment, the first top portion disposed about the first opening to form a top contact surface within the first opening, the at least one first attachment device extending from the first top portion and configured to penetrate into a first vertebra; a second endplate including a second base portion, second top portion and at least one second attachment device, the second base portion having a periphery and defining a second retention surface and a second mating surface opposite the second retention surface, the second mating surface being continuous within the periphery of the second base portion, the second retention surface engaging the bottom wall to retain the second base portion in the compartment, the second top portion disposed about the second opening to form a bottom contact surface within the second opening, the at least one second attachment device extending from the second top portion and configured to penetrate into a second vertebra; and a core internal component disposed in the compartment between the first endplate and the second endplate, the core internal component defining a third mating surface and a fourth mating surface opposite the third mating surface, the third mating surface mating with the first mating surface of the first base portion and the fourth mating surface mating with the second mating surface of the second base portion, wherein the external shell is stiffer than the core internal component.