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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 ?
Ritchie, On the in vitro fracture toughness of human dentin, J.
In Dentinogenesis Imperfecta Type I, the dentin mineralization defects are coupled with Osteogenic Imperfecta related bone diseases characterized by a systemic condition involving bone fragility, blue sclera of the eyes, joint laxity, and hearing impairment.
This turns the dentin mushy and useless, causing a cavity.
Using drills, they tried to reduce the bulk of the dentin.
Tetracycline is incorporated with calcium and may be observed in dentin or enamel, which are tooth structures.
Adhesion to dentin is the result of physical (micromechanical) and chemical interactions at the interface.
Origin and Evolution of Bone and Dentin and of Acidic Secretory Calcium-Binding Phosphoproteins
Mid-coronal dentin discs were obtained and then etched with citric acid, thereby opening the dental tubular orifices.
In addition to the dentin study, other highlighted research compared implant outcomes to endodontic therapy outcomes from patients' perspectives, determined the best approach for hypersensitivity with cervical tooth wear and studied the difference between the use and nonuse of a liner for dental restorations.
In their research into tooth development, scientists uncovered a gene that provides instructions for dentin sialophosphoprotein (DSPP), which plays a major role in the formation of the softer dentin.
This edition has been updated with new information and includes new authors for 11 chapters, with a new chapter on color and shade matching and a rewritten chapter on adhesion to enamel and dentin.
The researchers said that after 3 weeks the cells bundle started to look like a tooth, containing dental pulp, dentin, enamel space and enamel organ, the BBC reported.