That seems unlikely, given that these are teens who dislike brushing their teeth enough that they will put up with dental visits, likely involving local anesthesia and drilling, even though they know that not brushing will mean another round of dental unpleasantness.

I realize dentistry is less unpleasant now than when I was in my teens, but I am fairly sure the teenagers don't want to be going to the dentist. If conuly is right, right now they're putting up with the sensory unpleasantness of a dental drill and tooth filling rather than the daily unpleasantness of brushing their teeth. "And we'll take away your allowance" seems likely to lead to the kids avoiding dentists altogether as soon as possible.