no, it does not. calcium carbonate doesn’t bind to your teeth, whereas the fluoride does, as well as helping the natural calcium in your saliva rebind to your teeth.
think of the fluoride as a very special epoxy that sticks to calcium and makes it stronger, as well as causing saliva calcium to stick to the places bacteria and acid caused to lose calcium.
by itself, calcium carbonate won’t interact with your teeth positively, although in certain forms a little bit *with* a fluoride *might* help remineralization.
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