My drs never even discussed blocks. I wish they had when I had dental work done. They did prescribe extra percs for me though that helped with the pain. I didn't need them for more than about a week, but will consider discussing blocks with them next time around myself. My left upper tooth is throbbing right now. It doesn't always hurt, but the pain comes and goes. The denstist said there's nothing wrong with it, so I can't help but wonder if its the rsd spreading to my mouth. I just don't know and neither do any of my drs. It's so frustrating.