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, dentin
the calcified tissue surrounding the pulp cavity of a tooth and comprising the bulk of the tooth
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a variety of tooth tissue that makes up the principal mass of the tooth and is also found in placoid scale.

In contrast to other types of bone, the principal matter of dentin does not contain cavities with cells but is penetrated with tubules, in which are located processes called odonto-blasts (Tomes’ fibers), which are on the periphery of the basic matter. This matter consists of a network of collagen fibers, which form a more compact layer around the tubules and an interfibral amorphous substance. The dentin of the teeth of an adult human being contains about 28 percent organic matter, about 64 percent inorganic matter, and about 8 percent water. A variety of dentin is substitute dentin, or vasodentin; it is usually in the teeth and scales of fish. Its basic matter is penetrated with blood capillaries and contains cellular elements; there are no tubules.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


A bonelike tissue composing the bulk of a vertebrate tooth; consists of 70% inorganic materials and 30% water and organic matter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Effect of medicaments used in endodontic regeneration technique on the chemical structure of human immature radicular dentin: an in vitro study.
According to the literature available to the authors, there is no study comparing removal of cariogenic bacteria and carious dentin by measuring the temperature changes during caries ablation with different pulses of VSPt-based Er:YAG compared to FFC Er:YAG laser.
Furthermore, a 5.25% NaOCl solution considerably reduces the elastic modulus and flexural strength of dentin (27).
Thus, this case report describes the selective removal to firm dentin in the primary mandibular left first molar of a girl aged 7 years and 6 months using the Mineral Trioxide Aggregate (MTA Angelus) as a pulp protective material.
The expression levels of dentin sialophosphoprotein (DSPP), dentin matrix protein-1 (DMP-1), runt-related transcription factor-2 (Runx2), and osteocalcin (OCN) mRNA were determined by SYBR green real-time reverse transcription-PCR (RT-PCR) as previously described [22-24].
In Group 1, the exposed dentin surfaces were conditioned with GC cavity conditioner for a duration of 10 s, washed and air dried but not desiccated.
A slightly different role is played by progenitor cells originating from the apical papilla, which serve as the source of primary odontoblasts with the capacity for producing primary root dentin [17].
It is well established that hydrogen peroxide can penetrate the enamel and dentin. Previous work by the researchers showed that collagen in the dentin layer decreased when teeth were treated with whitening strips.
Keenan and team found that the collagen present in dentin becomes fragmented when exposed to hydrogen peroxide, which leads to the loss of collagen mass in that layer.
However, recent studies suggest that DMSO improves both immediate and long-term adhesive bond strength in dentin (24, 25).