Abstract: A spinal disc prosthesis comprising: (a) a distal spinal prosthetic comprising at least two separable portions; (b) a proximal spinal prosthetic comprising at least two separable portions, where at least one of the two separable portions of at least one of the distal spinal prosthetic and the proximal spinal prosthetic includes a partial loop appendage at least partially defining a spinal nerve canal.

Abstract: A spinal implant comprising one or more integrated walls spaced apart to define an interior cavity configured to retain bone graft material, and having at least one aperture providing a pathway between the interior cavity and an exterior environment of the implant; wherein at least one of the one or more walls has a lumen therein, the lumen terminating at a post-operatively accessible refill port and at one or more drug delivery ports disposed in a surface of the at least one wall, and configured to allow drugs to flow from the refill port to the one or more delivery ports.