Was in the chair for 8 hours complete cleaning (scaling) removal\replacement of mercuy amalgum fillings, replaced missing fillings and 3 extractions (one due to condition and two due to infection and bone loss. Bone grafts for implant placement done. Wasnt too bad, was happily out of it during the work. Sore afterword but a little Tylenol III took care of that. Hip surgery here I come.