The sonicare ones do wonders. I mean, they don't heal cavities or anything, but I haven't had a cavity for four years since I started using it and I'm a bit of a sugar addict.

My grandmother is always complaining about how she wants dentures. She has such horrible teeth, but the dentist is milking the money cow with everything he's got so he just keeps giving her caps and what not and tells her that some of the teeth have "some time left."