When I went to the Dentist on Tuesday I had to get my tooth taken out. What they didwas they took this medacine so I couldnt feel them removing my tooth. Then they took this big needle about 2 inches long and stuck it in my gums. i could just only feel it a little bit, but not that much. then they gave me an ice pack to put on my mouth because my mouth was swalloen. also my mouth was still numb after I left the Dentist. they also gave me some gauze because my mouth was bleeding.
picture from here.