Hi C., my almost 5 year old has bad teeth. First filling when he was 2,5 years old. 2 months ago he had a pulpotomy, and 3 really big fillings and one small. The dentist did it in two times, first ap. one side, the second ap. the other side. She told me it was nessesairy to give him nitrious oxide (laughing gas) because it were such huge repairs she had to do. I objected first, back in the Netherlands were I'm from we're not as over medicated as here in the USA. So no dentist uses it. But she convinced me that she could not give a good local anesthesia when the child is not fully relaxed, and because these huge repairs she needed to give a very good local anesthesia.
And basically she said if I didn't want it I had to see an other dentist and good luck with that because most dentists would give a total anesthesia in this case. (she said it in a polite way...)
So I agreed, and both times he came back happy, with a balloon and a couple of stickers. No pain afterwards, not afraid from the dentist.
So obviously she did a good job. Without knocking him unconcious, and without giving him medicine before or afterwards.
She and her staff is wonderfull. Her name is Dr. Rozas in Coppell (see also "local busines reviews"). I think she is reasonable prized. Well, it's never cheap, but I don't think she is over prized. Please let me know if you need her address and phone nr., I can look it up.
Personally I wouldn't allow my child to have a total anesthesia, it can have so many side effects. And it is for a dentist appointment, not for a surgery.
Good luck, I.