Just got back from the dentist’s

Hi, I am just returning from the dentist’s office. I often wonder how bad some of the chemicals they us are for us…but on the other hand, I would have a mouthful of rotten awful teeth if it wasn’t for dentistry.
I hate when the needle for the Novocain is injected and I always use the gas to be able to tolerate the needle. I know I am probably a wimp, but I use the gas anyway