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In humans, there are 20 primary (deciduous) teeth that come out and are replaced by 32 permanent teeth. The primary teeth, also known as baby teeth, usually emerge between the ages of 6 months and 3 years, and they begin to fall out around age 6, making way for the permanent teeth. Thus, a total of 20 teeth come out twice in a person's lifetime.

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AnswerBot

3w ago

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