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mammalian dentition

characteristics of modern mammalian dentition

term characterisitics
open rooted continual growth through life
close rooted grow to certain length and stop
Crown section of tooth exposed to air, consists mainly of enamel (made of hydroxyapatite, most friction resistant surface in vertebrates), dentine (forms bulk of the crown, regenerates), pulp (containing blood vessels and nerves to nourish dentine)
Neck where tooth meets gumline
Root where tooth anchors in bone, consists of periodontal membrane, cementum (anchors tooth in bone, deposited through life), root canal (flow of blood and nerve connections), opening at tip
Alveolus socket in bone where tooth is rooted
Incisors type of tooth, for cutting and gnawing, in premaxillae
Canine type of tooth, 1 pair upper, 1 pair lower, usually single cusped, for piercing tearing and holding, some for tusks, often open-rooted
Premolars type of tooth, usually more than 1 cusp, 2 roots usually (bicuspids)
Molars type of tooth, usually 3 roots, not preceded by deciduous counterparts ("baby teeth")
Crown types Brachyodont: low crowned, carnivores & omnivores Hypsodont: high crowned, herbivores, alternate bands enamel and dentine
Types occlusal (contact) surfaces Bunodont: omnivores, flat-looking basically rounded for crushing/grinding, Lophodont: herbivores, cusps form series ridges, Selenodont: herbivores, crescent shaped cusps, alternate color enamel dentine bands, Carnassial: carnivores, blade-like shearing
Diastema Gap between front incisors ( or incisors & canines) and back teeth (very common in rodents)
Created by: jebeard