Definition: The hard, glistening substance covering the coronal dentin of the tooth. In its mature form, it is composed of an inorganic portion made up of 90% hydroxyapatite and between 6% calcium carbonate, calcium fluoride, and magnesium carbonate, the remainder (4%) being an organic matrix of protein and glycoprotein.
[M.E., fr. Fr. enamailer, to apply enamel, fr. en, on, + amail, enamel, fr. Germanic]
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Examples: glitazone, GI cocktail, etc.