I read somewhere in the nourishing traditions book by
sally Fallon that children's teeth remineralize at a rate ten times faster than adults' teeth do. I was unaware that teeth did this at all before reading this. Her big things ( and mine too) are raw, organic milk from grass fed cows, and cod liver oil combined. You know- just make sure you get both each day because somehow they work together-- vit D plays in I'm sure. Anyway, I have had my kids on this for almost a year now and I can honestly see a difference. My 1yo has no overbite, my2yo and 5yo still do, but they sneak sweets and the 5yo doesn't drink much milk, however the 8yo had cavities that are GOING AWAY, and her teeth are whiter-- they were yellow (perm teeth) and the 11yo - her jaw does seem to be widening-- she even noticed the other day. 16yo not much difference; she drinks LOTS of milk but cant stand the cod liver oil, so isn't very judicious in taking it. My teeth are not so great due to fillings, but I was having pain, maybe start of a cavity? and now I don't.
Hope this helps. You may have already tried this, if not it may be worth a shot! --Kathy