Maggie, I am sorry by accident I used the wrong word which was probably age-related.
What I learn from reading those threads is that dentin can be regrown by remineralizing your teeth.
To do that quickly I would do this:
Anne said, "Some help clues that I got from those threads are:
Use Comfrey: there are products in those threads that contain comfrey if you don't want to grow it. Dr. Christopher makes several useful ones.
Use Diatomaceous earth to brush your teeth