https://singularityhub.com/2013/08/26/scientists-grow-teeth-...
I have a high risk of cavities due to my genetics, am 31, and my teeth are falling apart even with a high level of care (brushing 2-3 times/day, flossing, baking soda rinse after meals to return mouth ph to baseline quickly). I'll be happy to pay for replacement teeth grown from my own cells when available.
Good luck, teeth problems suck.
http://en.wikipedia.org/wiki/Erythritol
"Erythritol has been certified as tooth-friendly. The sugar alcohol cannot be metabolized by oral bacteria, so does not contribute to tooth decay. Erythritol exhibits some, but not all, of xylitol's tendency to "starve" harmful bacteria. Unlike xylitol, erythritol is actually absorbed into the bloodstream after consumption but before excretion. However, it is not clear at present if the effect of starving harmful bacteria occurs systemically."
"Erythritol More Potent Than Xylitol Against Dental Caries"
It grows really well in my backyard. Smells badly(but tastes sweet) but is a great sugar replacement for making lemonade or ice cream or sweets without the high glycemic index.
You also probably have to learn to brush your teeth better. When I was a kid I had lots of cavities, then I learned that I was doing it badly(I had plaque and tartar in my teeth and I got used to it). No one really told me, dentist don't feel the teeth the way your tongue does, they use a piece of metal.
So I brushed better so the surfaces of the teeth became smooth(it took some time but then maintaining that is really easy).
Since then, decades had passed and no new cavities.
If you are interested in remineralizing teeth to prevent decay, I suggest reviewing this regimen by the dentist Dr. Phillips.