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 (den´tin),

n the portion of the tooth that lies subjacent to the enamel and cementum. Consists of an organic matrix on which mineral (calcific) salts are deposited; pierced by tubules containing the processes of the odontoblasts that line the pulpal chamber and canal. It is of mesodermal origin. Older term is dentine.
dentin bonding agent,
n a tissue compatible adhesive that adheres to dentin.
dentin, carious,
n the dentin that is involved in or affected by the carious process.
dentin dysplasia,
dentin eburnation
(ē´burnā´shən),
n a change in carious teeth in which the decayed dentin assumes a hard, brown, polished appearance and becomes arrested.
dentin, globular,
n part of dentinal matrix consisting of completely fused and calcified globules of predentin.
dentin, hereditary opalescent
(ō´pəles´ənt),
n See dentinogenesis imperfecta.
dentin, hyperesthesia of
(hī´pəristhē´zhə),
n an excessive sensibility of dentin.
dentin, interglobular,
n the incompletely calcified dentinal matrix present between the calcified globules.
dentin, intertubular,
n the dentin present between the dentinal tubules.
dentin irritation (tertiary dentin, reparative dentin),
n the dentin formed in response to an injury or irritant.
dentin, mantle,
n the outer portion of dentin bordering the enamel or cementum of the tooth.
dentin, primary,
n a type of dentin, made of straight dentinal tubules, that develops until the apical foramen of the root of the tooth is fully formed.
dentin, residual carious,
dentin, sclerotic,
n See dentin, transparent.
dentin, secondary,
n the dentin formed or deposited on the walls of pulp chambers and canals subsequent to the complete formation of the tooth; caused by certain metabolic disturbances that result in irritation and stimulation of the odontoblasts to renewed activity.
dentin, transparent (sclerotic dentin)
(sklərot´ik),
n dentin formed as a defense mechanism in reaction to various stimuli. Dental tubules are obliterated by deposits of calcium salts that are harder and denser than normal dentin. This dentin appears transparent in ground sections.
dentin wall,
n the portion of the wall of a prepared cavity that consists of dentin.

dentin

see dentine.