Age and functional changes in dentin

Age and functional changes in dentin (1)    Primary dentin Primary dentin is formed till root completion. By age, primary dentin may show gradual reduction in the diameter of the dentinal tubules due to continual deposition of peritubular dentin. This may lead to decreased permeability and sensitivity of dentin. (2)    Secondary dentin Any dentin formed after complete formation […]

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Dentinogenesis

Posted by DAM on February 4, 2012 in Dentin | Short Link
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Dentinogenesis The odontoblasts that form dentin are differentiated from the ectomesenchymal cells of the dental papilla under the organizing influence of the inner dental epithelium. Dentinogenesis begins at the incisal edge or cusp tips then spreads down the cuspal slopes, toward the cervical region. In multi-cusped teeth, dentin formation begins independently at the sites of each future cusp in […]

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Innervation of Dentin

Posted by DAM on February 4, 2012 in Dentin | Short Link
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Innervation of Dentin Nerves enter the pulp space in company with the afferent blood vessels and generally follow a similar course once within the pulp chamber. They ultimately form an extensive nerve plexus adjacent to the cell– rich- zone. This plexus of nerves is called the subodontoblastic plexus or plexus of Raschkow and found in […]

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Structure of Dentin 2

Posted by DAM on February 4, 2012 in Dentin | Short Link
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Structure of Dentin 1 Structure of Dentin 2 Mantle Dentin Mantle dentin forms the outer layer of dentin immediately below the DEJ. It is the first layer of dentin formed by the odontoblasts. It is approximately 20um wide and has an organic matrix consisting of large collagen fibrils (Von Korff fibers) which are arranged at right […]

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Structure of Dentin 1

Posted by DAM on February 4, 2012 in Dentin | Short Link
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Structure of Dentin 1 The most characteristic histological features of dentin are the closely packed dentinal tubules which traverse its entire thickness and which contain at least part of their length the cytoplasmic extensions of the odontoblasts, the odontoblastic process. Each cell gives rise to one process. The cell bodies of the odontoblasts are aligned […]

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DENTIN

Posted by DAM on February 4, 2012 in Dentin | Short Link
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DENTIN  Dentin is a specialized calcified connective tissue that constitutes the main bulk of the tooth. It is covered by enamel in the crown and by cementum in the root. It surrounds the soft tissue of the pulp. Dentin and pulp are related tissues embryologically, histologically and functionally forming the dentin- pulp complex. Dentin forms […]

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