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Dentin (/ ˈ d ɛ n t ɪ n / DEN-tin) (American English) or dentine (/ ˈ d ɛ n ˌ t iː n / DEN-teen or / ˌ d ɛ n ˈ t iː n / DEN-TEEN) (British English) (Latin: substantia eburnea) is a calcified tissue of the body and, along with enamel, cementum, and pulp, is one of the four major components of teeth. It is usually covered by enamel on ...
[2] [3] Most of the crown is composed of dentin ("dentine" in British English) with the pulp chamber inside. [4] The crown is within bone before eruption. [5] After eruption, it is almost always visible. The anatomic root is found below the CEJ and is covered with cementum. As with the crown, dentin composes most of the root, which normally has ...
Dentin hypersensitivity is a relatively common condition. [4] [3] Due to differences in populations studied and methods of detection, the reported incidence ranges from 4-74%. [3] Dentists may under-report dentin hypersensitivity due to difficulty in diagnosing and managing the condition. [4]
Reactionary dentin is formed by odontoblasts when the injury does not damage the odontoblast layer. Reparative dentin is formed by replacement odontoblasts when the injury is so severe that it damages a part of the primary odontoblast layer. Thus a type of tertiary dentin forms in reaction to stimuli, such as attrition or dental caries.
Due to the close relationship between dentin and pulp, they are frequently considered together as the dentin-pulp complex. [43]: 118 The teeth and gums exhibit normal sensations in health. Such sensations are generally sharp, lasting as long as the stimulus. [18] There is a continuous spectrum from physiologic sensation to pain in disease. [18]
Dentin matrix acidic phosphoprotein 1 is a protein that in humans is encoded by the DMP1 gene. [ 5 ] [ 6 ] [ 7 ] Dentin matrix acidic phosphoprotein is an extracellular matrix protein and a member of the small integrin-binding ligand N-linked glycoprotein ( SIBLING ) family (other members being DSPP , IBSP , MEPE , and SPP1 ).
Dentin phosphoprotein, or phosphophoryn, is one of three proteins formed from dentin sialophosphoprotein and is important in the regulation of mineralization of dentin, [1] one of the main constituent materials of teeth (see dentinogenesis). Phosphophoryn is the most acidic protein ever discovered and has an isoelectric point of 1.
Enamel-dentin fracture A fracture is confined to enamel and dentin with loss of tooth structure, but exposing the pulp; Not tender upon percussion test; If tenderness is observed, evaluate the tooth for possible luxation or root fracture injury; Normal mobility; Sensibility pulp test is usually positive; Enamel-dentin loss is visible