gf just had one done the other week. They numbed it up there, scraped out the old dead stuff. Put in a temp filling, not full so it could drain... she went back a week later and they took out the temp filling and put in a permenant one.
They gave her some pain meds, but she only used one I think. If I didn't know she had it done, I wouldn't have been able to tell. She wasn't in pain or anything really.