Do they "eat our teeth" or?
Also, I've heard that bacteria's waste is mainly acid, and so it corrodes our teeth enamel. Is it true?
Also, I've heard that bacteria's waste is mainly acid, and so it corrodes our teeth enamel. Is it true?
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Your second question is the answer to your first. They do not try to "dig" in our teeth. They simply break down food particles caught in our teeth. But the acids they exude as waste products can indeed dissolve our tooth enamel, and that is where tooth cavities come from.
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There is no point, it simple does what it does to survive, and it doesn't 'dig into our teeth' it converse sugars into acids much like how you convert food into crap, and that's what screws up your teeth.