Main Page | See live article | Alphabetical index Tooth enamel is the smooth top layer of a tooth which protects the underlying dentine, with its many nerves, from injury and decay. Tooth enamel is denser and chemically more inert than other body tissues, but can be attacked and destroyed by lengthy exposure to acids created in the mouth by eating or drug use (including cocaine). See also: Bruxism Elephant and Mammoth ivory Fluorite Ivory Keratin Walrus ivory External Link Why Teeth Fossilize Better Than Bone This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.