Pain, no problems.
Dentists, no way.
I think i died from needles in my past life. My Doctor when i was 4 broke a needle in my arm, as i struggled that much, the gynecologist burning of 2nd degree cervical well he had me chatting away so nicely after numbing me i didn't know, and my chatting was all about my fear of needles and what i did to my doctor at 4, can you imagine the poor darling, whilst he's there doing it, he shirt himself i would be a jumping jack any second.... Lucky i didn't know...
So, with dentists, i also get the gas, or you can suck on something now that does the same thing, ambulances give it to you at the scene of an accident, and it makes me giggle and relaxed, so i don't see ( so to speak) the needle coming...
Also, after a few minutes when complete, i feel normal when i leave.
I am a smoker, trying to quit, so being sedated i agree can be dangerous, for me...
I had gums cut a month ago and bone placement, all just under this little tube, so it's another way, method of achieving what you require perhaps with less grogginess after.
CW