Humans have two sets of teeth over their lifetime:

• Children (primary or baby teeth): Typically have 20 teeth. These include incisors, canines, and molars. Children start losing these around age six as adult teeth develop

• Adults (permanent teeth): Usually have 32 teeth, which include 8 incisors, 4 canines, 8 premolars, and 12 molars (including 4 wisdom teeth). This full set typically appears by the late teens

It is common for adults to have fewer than 32 teeth due to wisdom teeth removal or other factors such as tooth loss or congenital absence of teeth. Some adults may have between 28 and 32 teeth depending on whether wisdom teeth are present or extracted

. In summary:

• Children: 20 teeth
• Adults: 32 teeth (28 if wisdom teeth are removed)

This count can vary individually due to genetics, dental health, or extractions