AskDefine | Define bicuspid

Dictionary Definition

bicuspid adj : having two cusps or points (especially a molar tooth); "bicuspid teeth"; "bicuspid leaves" [syn: bicuspidate] n : a tooth having two cusps or points; located between the incisors and the molars [syn: premolar]

User Contributed Dictionary

English

Adjective

  1. Having two points.

Noun

  1. A tooth with two cusps; a premolar tooth.

Extensive Definition

The premolar teeth or bicuspids are transitional teeth located between the canine and molar teeth. In humans, there are two premolars per quadrant, making eight premolars total in the mouth. They have at least two cusps. Premolars can be considered as a 'transitional tooth' during chewing, or mastication. It has properties of both the anterior canines and posterior molars, and so food can be transferred from the canines to the premolars and finally to the molars for grinding, instead of directly from the canines to the molars.
There is always one large buccal cusp, especially so in the mandibular first premolar. The lower second premolar almost always presents with two lingual cusps.
Premolar teeth by definition are permanent teeth distal to the canines preceded by deciduous molars. In primitive mammals there are four premolars per quadrant. The most mesial two have been lost in New World monkeys, apes, and humans. Paleontologists refer to human premolars as Pm3 and Pm4.

Additional images

Image:Illu mouth.jpg|Mouth (oral cavity)

See also

bicuspid in Min Nan: Sió-āu-chan
bicuspid in Catalan: Dent premolar
bicuspid in German: Prämolar
bicuspid in Dhivehi: ބޭރު ކޮލުދަތްތައް
bicuspid in Spanish: Premolar
bicuspid in French: Prémolaire
bicuspid in Italian: Premolare
bicuspid in Lithuanian: Kapliai
bicuspid in Dutch: Premolaar
bicuspid in Japanese: 小臼歯
bicuspid in Norwegian: Forjeksel
bicuspid in Polish: Ząb przedtrzonowy
bicuspid in Serbian: Преткутњаци
bicuspid in Swedish: Premolarer
bicuspid in Telugu: అగ్రచర్వణకాలు

Synonyms, Antonyms and Related Words

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