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Here are 5 fun facts about tooth
- We spend an average of 1920 hours brushing our teeth in a lifetime.
- A shark’s tooth falls out and rises again. A shark grows a total of 30,000 teeth in its lifetime.
- At the age of 6, a human child has 52 teeth. But most of it is hidden inside the skull. When one falls, the other begins to rise.
- Acids released by bacteria mix with tooth enamel and cause tooth decay.
- The ideal brushing time is two minutes.
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