enamel, the hardest substance in your body, cavity, holes in your teeth, plaque, a sticky substance on your teeth, saliva, helps to make food easy to swallow, dentist, a specialist who takes care of teeth, bones and muscles, gives shape to the body, joints, help you to bend your body, spine, is made up of many bones, calcium rich food - milk , cheese , curd, makes your teeth healthy and strong, sugar rich food - cake , candy , coke, not good for teeth

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