I actually don't know of a dentist smell. I guess it's only one of those smells you notice when you hate the dentist
I do dislike floride though. Yuck. Back when I was little they'd make me keep it in for five minutes. Well, i have issues with keeping things in my mouth and I'd puke after two. every time. You'd think they'd get the hint! Thank goodness technology is what it is nowadays! It's only one minute now and although I still start to gag, I don't actually upchuck anymore!