IMPLANTABLE SPINAL DISK

摘要

Spinal disk including a shell, first endplate, second endplate and core. The shell includes sidewalls, back wall, front wall, top wall, and bottom wall defining a compartment. The first endplate includes a first base, first top and first attachment. The first base is retained in the compartment. The first top is disposed about a first opening in the top wall to form a top contact surface. The first attachment extends from the first top portion. The second endplate includes a second base, second top and second attachment. The second base is retained in the compartment. The second top is disposed about a second opening in the bottom wall to form a bottom contact surface. The second attachment extends from the second top portion. The core includes a material injectable into a constrained space in the compartment between the first base and the second base.

主权项

1. An implantable spinal disk comprising:
an 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 defining a first retention surface and a first mating surface opposite the first retention surface, 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, 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 defining a second retention surface and a second mating surface opposite the second retention surface, the second retention surface engaging the bottom wall to retain the second base portion in the compartment, the first mating surface and the second mating surface defining a constrained space therebetween in the compartment, the second top portion disposed about the second opening to form a bottom contact surface, 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 comprising material injectable into the constrained space in the compartment between the first mating surface and the second mating surface, 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.