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.
