On the other hand, what are your thoughts about the relation between the type of foods we eat and dental health?

My understanding is that sugar, and (complex?) carbs in general have a massive toll on teeth. Admittedly I'm no expert, but it would seem that eating the food we evolved to eat (vegetables and meat mainly) should not damage our teeth in a significant and therefore would be no need for dental health practices.

Whether or not that is feasible on a population level is another question, but I'm fairly convinced at this point that the garbage food is wrecking our health and that includes teeth.