Adults have 32 permanent teeth, eight in each quarter of the mouth: two incisors, one canine, two premolars and three molars. They replace the 20 baby teeth between about 6 and 12 years of age, with the third molars arriving later, if at all.
| Location | Upper and lower dental arches |
|---|---|
| Parts |
|
| Nerve Supply | Superior alveolar nerves; Inferior alveolar nerve |
| Blood Supply | Superior alveolar arteries; Inferior alveolar artery |
| Venous drainage | |
| Lymphatic drainage |
|
Cut, tear and grind food and help shape speech sounds.
The first permanent molars erupt at about age 6, behind the baby teeth, and are prone to decay. Tooth loss affects nutrition and quality of life. Mouthguards protect the front teeth in contact sports, and a knocked-out permanent tooth should be replanted or kept in milk and seen urgently.
Bacterial acid damage to enamel and dentin causing cavities.
A permanent tooth knocked completely out, which has the best outlook if replanted within an hour.
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