dentition

(redirected from mixed dentition)
Also found in: Dictionary, Thesaurus, Medical.

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
..... Click the link for more information.
 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 ?
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.
The prevalence of supernumerary teeth in primary and mixed dentitions.
KEY WORDS: Moyers probability tables, Mixed dentition analysis.
Most agree that it should be initiated during the middle to late mixed dentition.
Factors contributing to mandibular anterior crowding in the early mixed dentition.
Kennedy, "Space control in the primary and mixed dentitions," Dental Clinics of North America, vol.
The total number of autistic children with primary dentitions were 51, in the mixed dentition 216, and in the permanent dentition 216.
The following direct quotes from student journals capture the 6 representative themes identified in this particular category (experience beyond the dental school, working in diverse populations, advanced preparation, charting mixed dentition, communication with children and difficulties adapting to the new environment), and provide a rich description from the student perspective.
Skeletal changes associated with plate-headgear therapy in the early mixed dentition.
Multiple single nucleotide polymorphism (SNP) assays for each gene were performed and analyzed using transmission disequilibrium test (TDT) analysis (FBAT software) for the three stages of dental development (first teeth, mixed dentition and adult teeth).
Objective: The purpose of this study was to determine dental archs' shape, and to describe differences in transversal dimensions and archs' depths in mixed dentition, in order to know occlusal harmony arrangement in a native student population from Leticia, Amazonas, Colombia.