I really freak out from the mention of that word just because I have had some bad experiences.. but that is just me... my friend has no issues at all and yes she sleeps throught it... .. Anyway.. I really hate dentist needels... other ones I can hadel but the dentist is trumatizing for me. So they give me gas the one you breath in it calms me down.. then he give me the needel, but by the time the gas kicks in I can't feel the needel anymore so that is the good part ,every thing after that is a easy.. then just close your eyes so you don't see anything. you will be fine. Depending on the tooth it can be two or three appointments. then depending on how weak the tooth is you may also need a crown to protect it...