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Normally, an adult has 32 teeth: 16 maxillary and 16 mandibular. These teeth are divided into 4 quadrants with 8 teeth each. Each quadrant consists of 2 incisors (dentes incisivi), 1 canine (dens caninus), 2 premolars (dentes premolares), and 3 molars (dentes molares). Teeth are located within the alveolar processes and are held in position by the periodontal ligament. Teeth are composed of enamel, dentin, and dental cement.
Last updated: Aug 15, 2022
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The teeth are derived from the 1st pharyngeal arch.
Stages:
Teeth begin to erupt within 6 months to 1 year of life, usually beginning with the lower incisors.
Teeth | Expected age at eruption | Expected age at shedding |
---|---|---|
Central incisor | 8–12 months | 6–7 years |
Lateral incisor | 9–13 months | 7–8 years |
Canine | 16–22 months | 10–12 years |
1st molar | 12–19 months | 9–11 years |
2nd molar | 25–33 months | 10–12 years |
Teeth | Expected age at eruption | Expected age at shedding |
---|---|---|
2nd molar | 23–31 months | 10–12 years |
1st molar | 14–18 months | 9–11 years |
Canine | 12–23 months | 9–12 years |
Lateral incisor | 10–16 months | 7–8 years |
Central incisor | 6–10 months | 6–7 years |
Blood supply:
Innervation:
Each tooth comprises 4 components: