definition of tooth decay for class seventh
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Tooth decay is a process in which the tooth becomes rotten due to the formation of cavities (holes) inside it leading to toothache. If we do not clean our teeth and mouth after eating food, then many harmful bacteria begin to grow and live on the teeth.
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Tooth decay is a process in which the tooth becomes rotten due to the formation of cavities (holes) inside it leading to toothache. ... These bacteria act on the sugar present in the left-over food particles sticking to the teeth to form acid.
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