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What is underbite and how is it treated?

Underbite is a dental term in which the front teeth of the lower jaw are placed ahead of the front teeth of the upper jaw. In fact, in this situation, the lower jaw is slightly ahead of the upper jaw. This condition is also called third class malocclusion and prognathism.

Some people may have partial underbite. But others may suffer from severe underbite. Mild cases of this malocclusion usually do not cause problems for people. But its severe cases, since it is a problem for speech, chewing and beauty of people, it should be treated. The most common problems of people with prognathism are:

  • Difficulty biting and chewing food
  • Difficulty in speaking (pronouncing some letters and words may be difficult)
  • Pain in the mouth and teeth due to jaw problems

The main causes of underbite

The alignment and coordination of your teeth may be affected by various factors. Normally, the teeth grow in such a way that the upper teeth are slightly higher than the lower teeth. Properly aligned teeth will prevent you from biting your cheeks, lips, or tongue while eating.

There are several factors that can cause a person to suffer from this malocclusion. Some common reasons include:

Childhood habits

Certain childhood habits may increase the risk of developing an underbite or other dental malformations. Some of the habits of children that cause this condition are:

  • Excessive thumb sucking
  • Pressing the teeth with the tongue.
  • Use of pacifiers in children over 3 years old
  • Prolonged and excessive bottle feeding


In some cases, underbite is inherited from parents and is a congenital or genetic problem. If even one of your parents has this malocclusion, there is a possibility that you too have this problem.

Therefore, a person may be born with a small jaw and mouth space or other defects, all of which can cause malocclusion at an older age.

Injury and trauma

Severe injuries to a person’s face and teeth may cause permanent damage to the jaw. Broken and damaged bones can often be repaired, but jawbones do not always fit together properly after surgical repair. Therefore, injury and trauma to the jaw and face can cause underbite.


The formation and growth of tumors in the jaw or mouth area may change the position of the jaws, which can lead to underbite in some cases.

Underbite treatment

Most people do not have perfectly aligned and regular teeth. (That is, they do not have regular teeth by inheritance or genetics). Normally, the low and mild level of the teeth does not require intervention and orthodontic treatment. However, treatment and correction of underbite, especially when it is really severe, should be on the orthodontist’s agenda. By treating all types of malocclusions, you can benefit from the following benefits:

  • It becomes easier to clean the teeth.
  • The risk of tooth decay and gum disease is reduced.
  • You will have less pressure on your teeth, jaws and facial muscles
  • The risk of breaking teeth decreases
  • You will not experience temporomandibular joint disorder symptoms

Some common and common treatment methods to get rid of underbite are:

Treatment at home

Brush your teeth with fluoride toothpaste at least twice a day for two minutes. Focus on brushing along the gum line and the inside, outside, and back of your mouth. Be sure to floss your teeth in addition to brushing your teeth. In addition, visit your dentist in Canada at least twice a year for a professional examination and cleaning of your teeth.

Dental treatment

Medical treatment is the only way to fix or correct the underbite and align the teeth. Performing orthodontic procedures and treatments can not only correct problems related to misalignment of teeth, but also give your face a more beautiful appearance.

In mild cases of underbite, the best orthodontist will use wires, plastic braces, or other simple tools to solve your problem.

In some severe cases of this malocclusion, the high number of teeth and their density is a problem. The dentist can help solve the problem of underbite by extracting one or more teeth.

In more severe cases, the orthodontist will probably use surgery to correct the malocclusion.

Underbite for infants and children

The sooner an underbite is diagnosed, the better it will be for you and your child. If your child’s underbite is mild, you can wait until he is 7 years old. At this age, they can use braces to correct this malocclusion.

A reliable research source shows that face masks can be used for the short-term treatment of some teeth alignment problems, especially in malocclusion.

If your child has a severe underbite (especially if the problem is caused by a birth defect such as a cleft lip or palate), early surgery may help correct the problem.

Underbite surgery

Most licensed oral surgeons can successfully correct this problem. Common surgery to correct this malocclusion includes the following:

  • Deformation of the jaw
  • Shortening or retraction of the lower jaw
  • Pulling the upper jaw forward


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