@robson78 Yes, bone bank bone is donor bone. It is cleaned and sterilized so there are no cells remaining in it. It is just the mineral matrix that is left over and your bone cells will grow into it to populate it. If he shaves off any bone preparing the surfaces, that is used to seed bone growth in a space left inside the bone spacer for that purpose. A typical ACDF puts a bone spacer in from the front. It's not as wide as vertebrae. I can understand why he wants a 2nd spacer in back. He has to make sure that all the surfaces will match up when he does this after removing the artificial disc. Sometimes there is a grove that an artificial disc slides into when they prepare the surface. Will he need to do an incision in the back of the neck for that? Make sure to discuss specifically that you want this with no metal hardware added so you are both on the same page. Did he schedule a surgery date?