Teeth have several important functions including chewing food and clear speech. The structure of a tooth includes enamel, the hardest substance in the body, which protects the tooth. Plaque, a sticky film of bacteria, forms constantly on teeth and can lead to unhealthy teeth if not controlled. Maintaining good dental hygiene through brushing and flossing helps prevent plaque buildup and protects teeth.

1. All About Teeth Teeth I really important.