Question for people on carbatrol and/or dexedrine

How are your teeth? Got cavities?
My teeth were perfect until I was around 20.
I don't remember what year I started taking carbatrol, but I was on carbamezapine for several years before that.
the only other med I've taken for just as long has been dexedrine.
Sometimes I wonder if dry mouth as a side effect has contributed to the rapid deterioration of my enamel and teeth.

Lovely choice to make: Have seizures/be a zombie/keep teeth
or
don't have seizures/be awake/lose teeth

I'm now a candidate for a full set of crowns. (not all at once, there's no way I could afford that.)