Question

what is the role of toothpastes in preventing cavities

Answer 1

They are basically basic in nature
Because some harmful bacteria in our mouth produces some acid
This basic medium neutralises it's effects so it prevents tooth decay of which cavities are the form

Answer 2

Hey friend here is your answer

Fluoride is a very safe and effective way to help prevent tooth decay, so is an important ingredient in toothpasteand mouthwashes. It works by making the enamel (that's the tooth's hard outer surface) more resistant to acids produced by the bacteria living on the teeth and gums.

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