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Pronunciation: den'tin

Definition: The ivory forming the mass of the tooth. About 20% is organic matrix, mostly type I collagen, with some elastin and a small amount of mucopolysaccharide; the inorganic fraction (70%) is mainly hydroxyapatite, with some carbonate, magnesium, and fluoride. The dentin is traversed by a large number of fine tunnels known as tubules, running from the pulp cavity outward; within the tubules are processes from the odontoblasts.

Synonym(s): dentinumTA, ebur dentis, substantia eburnea

[L. dens, tooth]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.