And others naturally have extra teeth, known as hyperdontia. Our different types of teeth help us cut, tear, mash, and grind our food, making it easier to swallow. Here’s what you need to know ...

Humans have different types of teeth, and canine teeth are ... Keira Knightley's Crooked Teeth Haven't Been A Problem For Her It is hard to miss "Atonement" star Keira Knightley's crooked teeth ...