| 释义 |
dentin
den·tin D0136800 (dĕn′tĭn) or den·tine (-tēn′)n. The main, calcareous part of a tooth, beneath the enamel and surrounding the pulp chamber and root canals.
den′tin·al (dĕn′tə-nəl, dĕn-tē′-) adj.den•tin (ˈdɛn tn, -tɪn) also den•tine (-tin)
n. the hard, calcareous tissue, similar to but denser than bone, that forms the major portion of a tooth, surrounds the pulp cavity, and is situated beneath the enamel and cementum. [1830–40; < Latin dent-, s. of dēns tooth + -in1] den′tin•al, adj. den·tin (dĕn′tĭn) The main bony part of a tooth beneath the enamel, surrounding the pulp chamber and root canals.Thesaurus| Noun | 1. |  dentin - a calcareous material harder and denser than bone that comprises the bulk of a toothdentineanimal material - material derived from animalsivory, tusk - a hard smooth ivory colored dentine that makes up most of the tusks of elephants and walruses | | 2. | dentin - bone (calcified tissue) surrounding the pulp cavity of a toothdentinebone, os - rigid connective tissue that makes up the skeleton of vertebratestooth - hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense |
TranslationsDentin
dentine, dentin the calcified tissue surrounding the pulp cavity of a tooth and comprising the bulk of the tooth Dentin 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. dentin[′dent·ən] (histology) A bonelike tissue composing the bulk of a vertebrate tooth; consists of 70% inorganic materials and 30% water and organic matter. dentin
dentin [den´tin] the chief substance of the teeth, surrounding the tooth pulp and covered by the enamel on the crown and by cementum on the roots. adj., adj den´tinal.den·tin (den'tin), Do not confuse this word with dentine.The ivory forming the mass of the tooth. About 20% is organic matrix, mostly type I collagen, with some elastin and a small amount of mucopolysaccharide; the inorganic fraction (70%) is mainly hydroxyapatite, with some carbonate, magnesium, and fluoride. The dentin is traversed by a large number of fine tunnels known as tubules, running from the pulp cavity outward; within the tubules are processes from the odontoblasts. Synonym(s): dentinum [TA], ebur dentis, substantia eburnea [L. dens, tooth] dentin (dĕn′tĭn) or dentine (-tēn′)n. The main, calcareous part of a tooth, beneath the enamel and surrounding the pulp chamber and root canals.
den′tin·al (dĕn′tə-nəl, dĕn-tē′-) adj.den·tin (den'tin) The ivory forming the mass of the tooth. Calcified tissue that is not as hard as enamel but harder than cementum. About 20% is organic matrix, mostly a fibrous protein collagen, with some elastin and a small amount of mucopolysaccharide; the inorganic fraction (70%) is mainly hydroxyapatite, with some carbonate, magnesium, and fluoride. It is traversed by closely packed tubules running from the pulp cavity outward; within the tubules are processes from the odontoblasts.
Synonym(s): dentinum. [L. dens, tooth]DentinThe middle layer of a tooth, which makes up most of the tooth's mass.Mentioned in: Tooth Decayden·tin (den'tin) [TA] Ivory forming mass of tooth.
Synonym(s): dentinum [TA] , ebur dentis. [L. dens, tooth]dentin
Related to dentin: exposed dentin, interglobular dentin, Dentin hypersensitivitySynonyms for dentinnoun a calcareous material harder and denser than bone that comprises the bulk of a toothSynonymsRelated Wordsnoun bone (calcified tissue) surrounding the pulp cavity of a toothSynonymsRelated Words |