Dr. Rigsby in Montgomery at Jackson Hosp. did mine. I really don't know what all I had done because I just needed relief. They talk all that stuff I don't understand. I know he said it was really bad. Said I had 2 fusions, 2 disc replaced, 2 metal plates, and 8 screws. On a side note: This is my biggest reason a few years ago going to 20 gauges over 12 gauges. I love them now and wish I had done it sooner.