5 fun facts about tooth
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.










