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, dentin
the calcified tissue surrounding the pulp cavity of a tooth and comprising the bulk of the tooth



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.


A bonelike tissue composing the bulk of a vertebrate tooth; consists of 70% inorganic materials and 30% water and organic matter.
References in periodicals archive ?
Cytotoxicity evaluation of single component dentin bonding agents.
Here, dentin bonding agents, color modifiers and opaquers, resins, ceramometal, porcelain, and acrylic materials are compared.
Comparative study of sealing ability of two root end filling materials with and without the use of dentin bonding agents.
The development of dentin bonding agents has produced adhesives that are classified according to the etching type and number of steps required.