dentin

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dentin

 [den´tin]
the chief substance of the teeth, surrounding the tooth pulp and covered by the enamel on the crown and by cementum on the roots. adj., adj den´tinal.

den·tin

(den'tin), Do not confuse this word with dentine.
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.
[L. dens, tooth]

dentin

/den·tin/ (den´tin) the chief substance of the teeth, surrounding the tooth pulp and covered by enamel on the crown and by cementum on the roots.den´tinal
adventitious dentin  secondary d.
circumpulpal dentin  the inner portion of dentin, adjacent to the pulp, consisting of thinner fibrils.
cover dentin  the peripheral portion of dentin, adjacent to the enamel or cementum, consisting of coarser fibers than the circumpulpar dentin.
irregular dentin  secondary d.
mantle dentin  cover d.
opalescent dentin  dentin giving an unusual translucent or opalescent appearance to the teeth, as occurs in dentinogenesis imperfecta.
primary dentin  dentin formed before the eruption of a tooth.
secondary dentin  new dentin formed in response to stimuli associated with the normal aging process or with pathological conditions, such as caries or injury, or cavity preparation.
transparent dentin  dentin in which some dentinal tubules have become sclerotic or calcified, producing the appearance of translucency.

dentin

(dĕn′tĭn) or

dentine

(-tēn′)
n.
The main, calcareous part of a tooth, beneath the enamel and surrounding the pulp chamber and root canals.

den′tin·al (dĕn′tə-nəl, dĕn-tē′-) adj.

dentin

[den′tin]
Etymology: L, dens
the chief material of teeth, consisting of calcium phosphate, surrounding the pulp and situated inside the enamel and cementum. Harder and denser than bone, it consists of solid organic substratum infiltrated with lime salts. Nerves course throughout its structure. Also spelled dentine.

den·tin

(den'tin)
The ivory forming the mass of the tooth. Calcified tissue that is not as hard as enamel but harder than cementum. About 20% is organic matrix, mostly a fibrous protein collagen, with some elastin and a small amount of mucopolysaccharide; the inorganic fraction (70%) is mainly hydroxyapatite, with some carbonate, magnesium, and fluoride. It is traversed by closely packed tubules running from the pulp cavity outward; within the tubules are processes from the odontoblasts.
Synonym(s): dentinum.
[L. dens, tooth]

Dentin

The middle layer of a tooth, which makes up most of the tooth's mass.
Mentioned in: Tooth Decay

den·tin

(den'tin)
[TA] Ivory forming mass of tooth.
Synonym(s): dentinum [TA] , ebur dentis.
[L. dens, tooth]

dentin

see dentine.