We have 32 permanent teeth, arranged in pairs in the upper and lower jaws.

A tooth has two parts - the crown and the root. Crown is the part of the tooth that stays above the gum while the root stays below the gum line. .

The hard white outside of the tooth is the enamel-the hardest material of the body.

The bacteria that forms plaque produces an acid, which erodes the enamel and leads to cavities.

Wisdom tooth is a third molar which appears in early teens or late twenties.