US Patent 9498349 Expandable spinal implant with expansion wedge and anchor

An interbody spinal implant system includes an implant having separate, but joined top and bottom portions, a socket for receiving an expansion wedge, an expansion wedge, and an anchor pin. The anchor pin includes at least two prongs having a plurality of ridges or teeth. The top portion and the bottom portion each include a slot for receiving a prong of the anchor pin. A movable joint joins the top and bottom portions and allows the top and bottom portions to move vertically relative to each other.