Teeth of humans are small, calcified, hard, whitish structures found in the mouth. They function in mechanically breaking down items of food by cutting and crushing them in preparation for swallowing and digestion. The roots of teeth are embedded in the maxilla (upper jaw) or the mandible (lower jaw) and are covered by gums. Teeth are made of multiple tissues of varying density and hardness.
Teeth are among the most distinctive (and long-lasting) features of mammal species. Humans, like other mammals, are diphyodont, meaning that they develop two sets of teeth. The first set (also called the "baby", "milk", "primary", and "deciduous" set) normally starts to appear at about six months of age, although some babies are born with one or more visible teeth, known as neonatal teeth. Normal tooth eruption at about six months is known as teething and can be painful.
Dental trauma refers to trauma to the face, mouth, and especially the teeth, lips and periodontium. The study of dental trauma is called dental traumatology.
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“[Christianity] existed and flourishes, not only without the support of human laws, but in spite of every opposition from them.”
—James Madison (17511836)
“With a new familiarity and a flesh-creeping homeliness entirely of this unreal, materialistic world, where all sentiment is coarsely manufactured and advertised in colossal sickly captions, disguised for the sweet tooth of a monstrous baby called the Public, the family as it is, broken up on all hands by the agency of feminist and economic propaganda, reconstitutes itself in the image of the state.”
—Percy Wyndham Lewis (18821957)