dentition

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dentition,

kind, number, and arrangement of the teethteeth,
hard, calcified structures embedded in the bone of the jaws of vertebrates that perform the primary function of mastication. Humans and most other mammals have a temporary set of teeth, the deciduous, or milk, teeth; in humans, they usually erupt between the 6th and 24th
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 of humans and other animals. During the course of evolution, teeth were derived from bony body scales similar to the placoid scales on the skin of modern sharks. Tooth structures such as those found in humans are restricted to certain vertebrates, i.e., most fish, mammals, and reptiles, and some amphibians. The teeth of sharks, which are primitive vertebrates, consist of simple conelike structures, sometimes with serrated edges and sometimes flattened for crushing shelled prey. In many lower vertebrates the individual teeth are replaced throughout the animal's life; old tooth loss and new tooth growth follow wavelike patterns down the length of jaw and affect alternate teeth at any one time, so that half the teeth in a region are always functional. Fish and reptiles that have teeth have homodont dentition; that is, all teeth are identical. The mammals have heterodont dentition, or teeth of different basic types, including incisors for nipping or cutting, canines for piercing, and premolars and molars for shearing and grinding. Carnivorous animals have relatively small incisors, used for grasping rather than for cutting; long and strong canines; and relatively thin, sharp premolars and molars, used for severing muscle and other tissues. Herbivorous animals have well-developed incisors, used to cut grass and other vegetation; canines that are either smaller than those of carnivores or absent altogether; and broad, flat premolars and molars for grinding food. In some herbivores, the upper canines are absent, so they cut vegetation by the combined action of the tongue and lower incisors. Omnivorous animals such as man have less specialized dentition. Only part of the dentition of mammals is usually replaced; however, the incisors of rodents grow out at the base as fast as they wear down at the tip. Teeth, the hardest structures in the body, have been well preserved as fossils and have played an important role for paleontologists and physical anthropologists in the study of human evolution.

dentition

[den′tish·ən]
(vertebrate zoology)
The arrangement, type, and number of teeth which are variously located in the oral or in the pharyngeal cavities, or in both, in vertebrates.

dentition

1. the arrangement, type, and number of the teeth in a particular species. Man has a primary dentition of deciduous teeth and a secondary dentition of permanent teeth
2. teething or the time or process of teething
References in periodicals archive ?
Keywords: Dental arch, Inter-canine width, Mixed dentition, Orthodontic intervention.
Maxillary protraction is an important means of orthodontic treatment of skeletal class III malocclusion in mixed dentition, suitable for maxillary hypoplasia, maxillary retrusion of the patients, can promote the growth and development of the maxilla, this method has also been proved to have obvious growth and improvement effect for providing a more favorable environment for the normal development of the maxilla and mandible (Cordasco et al, 2014; Ngan & Moon, 2015; Scherer et al, 2015).The timing of the treatment is about 8 years old, or after the eruption of the maxillary central incisor and the lateral incisor.
The aim of the present study was to compare the dentoskeletal features of subjects with normal occlusion in the mixed dentition and different facial patterns by means of a geometric morphometric analysis (TPS analysis) applied to PA cephalograms.
Conclusions: The new prediction tables derived in this study provided a more precise mixed dentition space analysis than Moyers prediction tables in estimating tooth dimensions in the Saudi population.
Pancherz [14] evaluated 30 Class II, Division 1 children in the mixed dentition who were treated successfully with activators.
- To use it in mixed dentition, adapting the treatment to the changes that the dentition under- goes, such as exfoliation of temporary teeth, or eruption of permanent teeth.
Relationship between occlusal findings and orofacial myofunctional status in primary and mixed dentition. Part I: Prevalence of malocclusions.
Varrela, "Occurrence of malocclusion and need of orthodontic treatment in early mixed dentition," The American Journal of Orthodontics and Dentofacial Orthopedics, vol.
Hard tissue examination revealed mixed dentition with permanent incisors, deciduous canines and molars in each quadrant.