(n.) A peculiar toothlike fossil of many forms, found especially in carboniferous rocks. Such fossils are supposed by some to be the teeth of marsipobranch fishes, but they are probably the jaws of annelids.
Example Sentences:
(1) Furthermore, the identification of vertebrate hard tissues in the oral elements of conodonts extends the earliest occurrence of vertebrate hard tissues back by around 40 million years, from the Middle Ordovician (475 million years ago) to the Late Cambrian (515 million years ago).
(2) The presence of cellular bone in conodont elements provides unequivocal evidence for their vertebrate affinities.
(3) From histological investigations into the microstructure of conodont elements, a number of tissue types characteristic of the phosphatic skeleton of vertebrates have been identified.
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.