dentition


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to dentition: primary dentition

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 dependent variable was the prevalence of having a functional dentition, which was scored with a 0 indicating subjects with fewer than 21 teeth present in the mouth and a 1 indicating subjects with 21 or more teeth.
1 Open bite - Lack of vertical overlap of the mandibular dentition by the maxillary dentition
7 They may still be utilized for future permanent dentition, following maximal multi-modal therapy including pharmacotherapy, psychosocial counseling and behavioral intervention.
19) Researchers studied normal subjects with permanent dentition and concluded that there is relationship between MBF and age as well as height and weight (6) and the present study found a trend [Table 2].
1, 6) Gemination is observed in the deciduous as well as in the permanent Dentition.
Dental crowding in primary dentition and its relationship to arch and crown dimensions.
5-8) Few epidemiological surveys have addressed the primary dentition and even fewer studies have associated malocclusion with socioeconomic indicators.
Besides clinical analysis, patients with mixed dentition require model analysis as part of the necessary data to establish a diagnosis.
Scenario #2: Long-term care resident, well-educated female in her 70s, evidence of cognitive decline, full dentition, poor oral hygiene, high caries risk, root caries eventually amputating most teeth despite efforts to restore.
Spacing is a common condition in the primary dentition and constitutes a very important feature of the dentition as it is an indicator of favorable development of permanent occlusion.
Here we present the first examples of supernumerary teeth in the dentition of members of the extant tree sloth genus Choloepus.