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Humans typically have two sets of teeth over their lifetime: primary (baby) teeth and permanent (adult) teeth.
Primary (Baby) Teeth
Children usually develop a set of 20 primary teeth. These teeth begin to appear (erupt) around six months of age and are fully in place by about age three. The primary teeth include:
4 central incisors
4 lateral incisors
4 canines (cuspids)
8 molars
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Permanent (Adult) Teeth
Adults usually have a set of 32 permanent teeth. These teeth replace the primary teeth and include additional molars. The permanent teeth typically begin to erupt around age six and can continue until about age 21. The 32 permanent teeth include:
4 central incisors
4 lateral incisors
4 canines (cuspids)
8 premolars (bicuspids)
12
molars (including 4 wisdom teeth)
Wisdom teeth, also known as third molars, are the last to appear and often emerge in late adolescence or early adulthood. Not everyone develops all four wisdom teeth, and some people may need to have them removed if they cause problems such as crowding or impaction.
