I could tell a story like that, abut fluoride. Holes and cavities was never an issue with my teeth, with or without carbs and sugar. However, plack build up always has been, no matter the amount of flossing and electric toothbrushes, I always had to go to the dental hygienist to get rid of that plack, several times per year.
Then I stopped with fluoride toothpaste. Added a routine of using coconut oil, baking soda, sea salt and coal powder. The build up stopped! There are some stuff to remove, but it doesn't harden like it used to... Amazing, no? 😎