Sweet tooth may lead to decay'.Explain why? What is the role of tooth paste in preventing cavities?

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Solution

Remains of the sweets being taken may be present in between the teeth and bacteria acts on them at night producing an acid that causes decay of the enamel of the teeth. Toothpaste contains certain bases that help in destroying these bacteria and neutralising this acid, thereby preventing tooth decay.

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To prevent tooth decay, one is advised to brush the teeth regularly. The ingredient of the paste which checks tooth decay is:

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