Understanding Tooth Growth: When Do Teeth Stop Growing?

Your teeth don't stop growing; only the roots do. Their height stops increasing once your permanent teeth come in, which happens between the ages of 6 and 21. While the crowns don't grow much, the roots can continue to form until people are in their late 30s. This growth happens so gradually that it's not noticeable and helps support the teeth as the mouth changes to accommodate other growth.