When can I expect my child's permanent (adult) teeth to begin showing?

Your child's permanent teeth, sometimes referred to as secondary teeth or adult teeth, usually arrive between the ages of six and seven. It is not uncommon for them to come in earlier or later than this, though.
Marvin D. Berman, MD

Dr. De Vizio's answer is correct. One interesting note:

Often the first permanent teeth to erupt (come in the mouth) are the 6-year molars in the back of the mouth. They come in behind all the teeth. Many parents are not aware of the new teeth being there since they're waiting for that magical time when the baby teeth in front get loose and the new teeth arrive. Surprise! Surprise!

Teeth vary in size, shape and location in the jaws. These differences enable them to work together to help you chew, speak and smile. When a baby is born, the 20 primary teeth are already present in the jaw.

As a child gets older, the 20 baby teeth will be replaced by 32 permanent teeth. The first permanent molars usually emerge between ages six and seven and are sometimes referred to as six-year molars. By age 21, all 32 of the permanent teeth have usually erupted.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.