In a normal bite, the upper teeth cover the lower teeth, while in what is commonly referred to as “ingrown teeth”, the lower teeth protrude backwards in front of the upper teeth, which is medically known as “anterior dentition”. There is a high genetic predisposition for “ingrown teeth”. One study found that 1/3 of children with a clubbed tooth have a parent with the same problem, and 1/6 of children have a sibling with a clubbed tooth. So, what should babies be aware of when one or both parents have “ingrown teeth”? When the baby’s baby teeth come in, parents should check to see if the baby’s teeth are also “ingrown”. If this is the case, it should be corrected in time, because this abnormal tooth relationship will have a negative impact on the growth of the upper and lower jaws. The growth of the upper jaw is inhibited by the obstruction of the teeth below, and the growth of the lower jaw is overgrown by the thrust of the upper jaw growth. The best time to correct is around 4 years old, parents can use a 1mm thick piece of wood or bamboo placed between the inner side of the upper front teeth and the outer side of the lower front teeth, let the baby bite 100 times a day; or go to the hospital to do a removable braces, wear a period of time can be corrected “encrusted sky”. Although it is easier to correct a diastema, many children will have it reappear after the teeth change. For the problem of a deflated upper jaw, doctors can solve it by wearing a mask to bring the entire upper jaw forward to a normal position when the child is 7-9 years old, and the correction can be completed in about six months. Wait until the development is complete before treatment. Because the lower jaw grows later than the upper jaw during growth and development, there is still a risk of reappearing during the youthful development period for patients who have been treated earlier or for children with normal teeth bite. At this time, most patients need to undergo combined orthodontic and orthognathic surgery after the completion of puberty.