What's the difference between odontoblast and tooth?
Odontoblast
Definition:
(n.) One of the more or less columnar cells on the outer surface of the pulp of a tooth; an odontoplast. They are supposed to be connected with the formation of dentine.
(n.) One of the cells which secrete the chitinous teeth of Mollusca.
Example Sentences:
(1) This heterogeneity of the osteoblast and odontoblast population suggests that the composition of the matrix produced by these cells also differs.
(2) The involution of crown odontoblasts after primary dentinogenesis in teeth of limited eruption is discussed.
(3) Following the decrease of alpha-tubulin reaction in ameloblasts and odontoblasts, their shapes and polarities changed dramatically.
(4) The localization of alkaline phosphatases in dentinogenically active rat incisor odontoblasts was studied by means of subcellular fractionation and electron microscopical histochemistry.
(5) While exposure of root surface dentin alone (negative control) produced no alterations, grinding the surface (positive control) caused noticeable changes in dentin, odontoblasts, and pulp.
(6) This layer had lysyl-oxidase (EC 1.4.3.13) activity, 4-11 times higher than either the sub-odontoblast layer or central pulp tissue, and similar to that in chick aorta, one of the tissues richest in such activity.
(7) Cell migration and replication associated with odontoblast replacement occurring soon after pulp exposure in primate teeth were studied.
(8) However, when root resorption neared completion, inflammatory cells started to gradually infiltrate into the pulp, and odontoblasts began to degenerate.
(9) Immunohistochemical localization of various matrix molecules showed that the matrix glycoproteins fibronectin and tenascin are accumulated in the dental basement membrane at the time of odontoblast differentiation.
(10) HRP injected into the vascular system of normal animals 28 days of age and older was localized histochemically (from 5 to 90 min after injection) throughout the extracellular spaces of the maxillary dental pulps; however, the tracer did not penetrate beyond the tight junctions at the apical region of the odontoblast cell layer, and was absent from the predentin and dentin.
(11) To determine the size of the unprocessed form of DPP, Xenopus laevis oocytes were incubated in [32P]-phosphate-containing medium after microinjection of poly(A)+ mRNA extracted from the bovine odontoblasts.
(12) Three days after cavity preparation, newly differentiating odontoblasts took the place of the degenerated odontoblasts.
(13) By comparing the number and size of the odontoblasts responsible for dentinogenesis in 18 months old adult Xenopus laevis with the odontoblasts in the larval specimens, the conclusion was drawn that, despite the larger size of the adult teeth, the time involved in their development and replacement may well be of similar duration to the smaller larval teeth.
(14) Observations on denervated pulps as well as pulps in which nerve regeneration had taken place did not reveal any changes in the pattern of laminin-immunoreactivity in basement membranes or odontoblasts.
(15) The intense expression of pro-alpha 2(I) mRNA in odontoblasts of adult teeth suggests that even after the completion of primary dentin formation, they continue to synthesize heterotrimeric type I collagen molecules.
(16) Since the most characteristic protein synthesized by odontoblasts is the dentin phosphoprotein which is thought to regulate hydroxyapatite growth, its cellular and extracellular distribution was also studied.
(17) It is suggested that the lead line results from a direct effect of lead on the odontoblasts and other hard tissue-forming cells producing a rapid loss of intracellular calcium temporarily displaced by lead ions and a subsequent disturbance of local calcium metabolism.
(18) The higher oxygen tension improved the matrix formative function of odontoblasts.
(19) Early odontogenic induction induces the transformation of fibroblasts into cells with enzymatic activities similar to those of odontoblasts and the calcification of collagen fibers seen in one of our cases would express an early mineralization.
(20) The impression technique can result in reduction of the odontoblastic layer caused by drying of the dentin.
Tooth
Definition:
(n.) One of the hard, bony appendages which are borne on the jaws, or on other bones in the walls of the mouth or pharynx of most vertebrates, and which usually aid in the prehension and mastication of food.
(n.) Fig.: Taste; palate.
(n.) Any projection corresponding to the tooth of an animal, in shape, position, or office; as, the teeth, or cogs, of a cogwheel; a tooth, prong, or tine, of a fork; a tooth, or the teeth, of a rake, a saw, a file, a card.
(n.) A projecting member resembling a tenon, but fitting into a mortise that is only sunk, not pierced through.
(n.) One of several steps, or offsets, in a tusk. See Tusk.
(n.) An angular or prominence on any edge; as, a tooth on the scale of a fish, or on a leaf of a plant
(n.) one of the appendages at the mouth of the capsule of a moss. See Peristome.
(n.) Any hard calcareous or chitinous organ found in the mouth of various invertebrates and used in feeding or procuring food; as, the teeth of a mollusk or a starfish.
(v. t.) To furnish with teeth.
(v. t.) To indent; to jag; as, to tooth a saw.
(v. t.) To lock into each other. See Tooth, n., 4.
Example Sentences:
(1) However in the deciduous teeth from which the successional tooth germs were removed, the processes of tooth resorption was very different in individuals, the difference between tooth resorption in normal occlusal force and in decreased occlusal force was not clear.
(2) Of the 622 people interviewed, a large proportion (30.5%) believed that the first deciduous tooth should erupt between the age of 5-7 months; the next commonly mentioned time of tooth eruption was 7-9 months of age; and 50.3% of the respondents claimed to have seen a case of prematurely erupted primary teeth.
(3) 4) Parents imagined that fruit drinks, carbonated beverages and beverages with lactic acid promoted tooth decay.
(4) The method used in connection with the well known autoplastic reimplantation not only presents an alternative to the traditional apicoectomy but also provides additional stabilization of the tooth by lengthing the root with cocotostabile and biocompatible A1203 ceramic.
(5) In the aetiology the Periodontitis apicalis and wounds after tooth extractions are in the highest position.
(6) It is of special interest because it presented as a periapical pathosis associated with a nonvital tooth and emphasizes the value of routine histopathologic examination of tissue.
(7) An 11-year clinical and radiographic follow-up of an avulsed tooth, replanted within 15 minutes, has been presented.
(8) It has been 40 years since the first community in the United States added a regulated amount of fluoride to its public water supply to prevent tooth decay.
(9) The odontogenic origin of ameloblastomas is based largely on the similarity in histologic appearance between the tumor and the developing tooth organ.
(10) It was shown that: although the oral hygiene level was very low and no dental treatments were performed, caries level was very low--although gingivitis rate was high, advanced periodontitis rate was low--the frequency of interincisive diastema (one subject out of 4 in the 15-19 age group), the progressive decline of tooth cutting, a traditional practice, in town people but the large extent of cola use (one adult out of two).
(11) The primary aim of future work must still be directed toward preventing the formation of a gap between the restoration and the tooth.
(12) This experiment is to observe the effect of pulsed electromagnetic field (PEMF) on orthodontic tooth movement of guinea pigs through transmission electron microscope (TEM).
(13) By scoring every section of a tooth in this way, an overview was obtained of the location of all caries lesions in the occlusal surface.
(14) In order to clarify the development of mandibular movements associated with growth and development of the stomatognathic system, we compared the mandibular movements of children with normal occlusion at different Hellman's dental age between IIA and IIIB, during tooth tapping movements using the following 7 different kinds of frequency; ad lib.
(15) It is not same to the stainless steel wire of traditional removable appliances which must be activated every time to produce a little tooth movement.
(16) Noxious conditioning stimulation of a tooth led to a temporary decrease of the threshold for the jaw-opening reflex elicited from a contralateral or adjacent tooth; only conditioning stimulation at an intensity producing a marked arousal reaction was effective in this respect.
(17) The tooth also gave a positive response to pulp-testing procedures, even though no new tissue could be demonstrated histologically.
(18) In eight consecutive patients referred to the University of Queensland Dental School for investigation of tooth surface loss, six had no measurable quantities of resting whole saliva, four had low values for stimulated saliva flow rates, and only two patients had buffer capacities within the normal range.
(19) (a) unaltered tooth, (b) access preparation, (c) instrumentation, (d) obturation, and (e) MOD cavity preparation; or 2.
(20) Probit analysis was used to derive the median age of tooth emergence.