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How many primary teeth do children have?

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Humans have 20 primary teeth, also known as deciduous or baby teeth. This set of teeth typically begins to appear about six months after birth, with the full primary dentition completed by age 2 1/2.1

The primary dentition consists of four incisors, two canines, and four molars in each jaw. These teeth are generally smaller, whiter, and more prone to wear than permanent teeth. Shedding of these teeth begins around age 5 or 6 as the roots are resorbed to make way for the permanent teeth, a process that is typically finished by age 13.1