What Is Tooth Enamel?
Tooth enamel is the visible, outermost covering of your teeth. The color of healthy enamel varies from light yellow to a gray or blue-like white. It’s the hardest substance in the human body and contains a high percentage of minerals. These minerals provide enamel with the strength it needs to protect the teeth and help keep them looking bright and white.
The role of tooth enamel
Enamel has an average thickness of 2.58 mm—about the size of a thin wedding band or a key. Yet, it effectively protects the sensitive inner layers of teeth from the acids that can cause painful cavities and from exposure to hot, cold, and acidic foods.
Enamel is also the key to white teeth. If the white layer of enamel wears away, it exposes the yellow inner layer of the tooth, called dentin.
How to protect your enamel
Keeping enamel strong is important for maintaining good oral hygiene—and having strong enamel makes your teeth more resistant to acid wear. By taking simple steps every day, you can help protect your teeth from the effects of acid erosion.