Teeth help a person use their mouth to eat, speak, smile, and give shape to their face. Each type of tooth has a name and a specific function.
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Tooth enamel is the hardest substance in the human body, but, until now, no one knew how it managed to last a lifetime. The authors of a recent study conclude that enamel's secret lies in the imperfect alignment of crystals.
Tooth extraction involves completely removing a tooth from the mouth. People may require tooth extraction for many reasons, ranging from tooth decay to crowded teeth.