Dentin

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

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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.

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den·tin (dntn) or den·tine (-tn)

n.

The main, calcareous part of a tooth, beneath the enamel and surrounding the pulp chamber and root canals.

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Dentin

The middle layer of a tooth, which makes up most of the tooth's mass.

Mentioned in: Tooth Decay

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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,

n See dysplasia, dentinal.

dentin eburnation

(ē´burnā´shn),
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´ples´nt),
n See dentinogenesis imperfecta.

dentin, hyperesthesia of

(hī´pristhē´zh),
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,

n See caries, dental, residual.

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)

(sklrot´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.

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dentin

see dentine.