dentition

(redirected from primary dentition)
Also found in: Dictionary, Thesaurus, Medical, Legal.
Related to primary dentition: permanent 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 ?
Similarly, we did not analyse data on the basis of permanent and primary dentitions.
Study of occlusal characteristics of primary dentition and the prevalence of maloclusion in 4 to 6 years old children in India.
In the present case, the esthetic view was a problem in primary dentition and the family was uninformed on the fused teeth until the patient visited the Dental clinic.
Fusion in Primary Dentition with Partial Anodontia of Permanent Dentition: A Case Report.
Occlusion and tooth/arch dimensions in the primary dentition of preschool Jordanian children.
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.
5-8) Few epidemiological surveys have addressed the primary dentition and even fewer studies have associated malocclusion with socioeconomic indicators.
Dental fillings for the treatment of caries in the primary dentition.
These reports have completely ignored the considereable body of research showing the improved oral health-related quality-of-life outcomes that care achieves in the primary dentition.
The genetics of tooth agenesis: new discoveries for understanding by agenesis in the primary dentition.
Commercial xylitol-containing products may be used to help control rampant decay in primary dentition.
2) These injuries are more common in the primary dentition than the permanent dentition, due to the spongy nature of a young child's bone and the lower crown-to-root ratio of the tooth.