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A tooth (plural teeth) is a hard, calcified structure found in the jaws (or mouths) of many vertebrates and used to break down food. Some animals, particularly carnivores, also use teeth for hunting or for defensive purposes. The roots of teeth are covered by gums. Teeth are not made of bone, but rather of multiple tissues of varying density and hardness. The cellular tissues that ultimately become teeth originate from the embryonic germ layer, the ectoderm.

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Teeth Whitening

Here's a great teeth whitening trick you can do at home!

Contributed by Katie Leavitt

For teeth that are super sensitive, rubbing a sensitive toothpaste (like sensodyne) right on the gum of the tooth and leaving it for a while will help relive pain. Source: my dentist

Contributed by Courtney Meunier

3 Natural Teeth Whitening Treatments

There are also natural treatments that can provide the wanted results when it comes to teeth whitening. Below you can find 3 such natural treatments.

Contributed by Tess Chaffin

Not all babies are born without teeth. 1 baby in every 2,000 to 3,000 births is born with what's called natal teeth; teeth that are already developed in the gums. The teeth usually grow in 30 days after birth.

Contributed by Kathy Guo

Is Flossing Teeth Really Necessary?

There's no question that if you take 100 people off the street, and they all have the same diet and everything else the same, but one group flosses and one doesn't, you would find more inflammation and gum problems and perhaps bone loss in the group that did not floss. If you want to keep 'em, you've got to keep 'em clean.

Contributed by Laura Diana Escamilla

The tooth. The main source in our mouths to eat food.

Contributed by Kelsey Nagel

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