There's something called... "Oil Pulling" to help clean teeth.
   It's an ancient practice. Usually it's Olive Oil, but I'm sure
   any small-molecule oil would work. Fish oil is also a
   small-molecule oil.

   You could probably use mineral oil as well. All equally small
   molecule. [I wouldn't swallow the mineral oil necessarily but
   then again, if you've used it to clean your teeth, you probably
   want to spit ANY oil out anyway).

   I've tried it before; might try it again.

   Oh I have some article somewhere about tooth remineralization
   using breathing - lemme see if I can find it...