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Did by the germs causses tooth decay ?

Good oral health comes from reducing the things that harm teeth and increasing the things that help teeth.

Dental caries, also known as tooth decay or a cavity, is an infection, usually bacterial in origin, that causes demineralization of the hard tissues (enamel, dentin and cementum) and destruction of the organic matter of the tooth, usually by production of acid by hydrolysis of the food debris accumulated on the tooth surface .