EristicHeuristic

Have you ever used this stuff called GC MI paste? It's a calcium paste that super remineralizes your enamel with a bunch of calcium, as opposed to the tiny bit of fluoride in toothpaste. I have pretty sensitive teeth and letting it sit for 15 minutes will keep the sensitivity at bay for 1-2 weeks... It's a bit expensive ($15-20/tube) but you can buy it online or from some dentists. Perhaps worth looking into?

Also, since you mentioned it in another comment, what's your planned career?

I figured most likely it didn't work for some reason, but figured I'd mention it on the off chance.... Bummer. When I was a kid I remember getting a plastic coating around my back molars that prevented cavities. Is that an option?

This is the future, why are we not able to regrow/transplant teeth already?!