I had my two upper taken out about 2 years ago. (they were impacted too) It was done at an oral surgeons, not in a hospital. The dr was fantastic! I think I had to have abt ten needles cos I could still feel the pressure. I dont mind the needle (would prefer that then to feel drilling and stuff).

Anyway, I nearly passed out as it was quite warm that day.

You could hear the cracking (I think that was the worst bit), but all in all, it wasn't bad at all. I think I said I could even do it again! ha ha.

The nurse told me to put tampons to plug up the holes if I started bleeding. Good tip it worked!