What You Need to Know About Prognathism – Causes, Effects, Treatments


Prognathism is a medical condition where facial bones grow abnormally. It leads to the misalignment of your teeth and jaws. Either of your lower jaw (mandible) or upper jaw (maxilla) gets overdeveloped and protrudes out. When the upper jaw is the culprit, it is called Overbite. Dentists also call it overjet or maxillary excess. In the case of lower jaw protrude, they call it Underbite. Sometimes, Prognathism can affect both upper and lower teeth. This condition is known as Malocclusion.

It’s important to recognize and rectify this condition timely. It leads to various issues in breathing, appearance, speaking, biting, and chewing.

Let’s have a look at its types, causes, and treatment…

Types of Prognathism

Alveolar Prognathism

Alveolar Prognathism is a protrusion of the maxilla’s part in the upper jaw’s dental lining where the teeth are located. It is often caused by thumb sucking or tongue thrusting in childhood. Parents can control these habits in their kids to prevent this condition in the future.

Mandibular Prognathism

Mandibular Prognathism is a condition where the lower jaw is overgrown. In some cases, the upper jaw remains under grown. This deformity cause problem in speech and chewing. Genetic and environmental factors can contribute to this condition.

Maxillary Prognathism

Maxillary Prognathism is popularly known as an overbite. It is the most common type of Prognathism. Usually, it is not as noticeable as the other forms of Prognathism. It can occur due to genetic reasons. Orthopedic or surgical treatments can easily cure it.

What Causes Prognathism

The most common cause of Prognathism is a genetic defect. Rarely, underlying medical conditions are also responsible for it. You can have a look at them here:


Sometimes, your body produces excess growth hormones after growth plates get closed in the bones. It results in overgrowth of the lower jaw. This condition is often found in adults.

Basal Cell Nevus Syndrome

  • Gigantism: Gigantism is quite similar to Acromegaly. The only difference is the increase in growth hormone happens before the bones’ growth plates are closed. So, this condition generally affects kids rather than adults.
  • Crouzon Syndrome: In this condition, skull bones get blended permanently. It affects overall facial features in kids.

When is the Time to Seek Professional Help?

Genetically inherited prognathic condition usually doesn’t present many challenges health-wise. But if it is troubling you in the form of misaligned teeth, biting or speech problems, pain, and discomfort in teeth, you should seek appropriate treatment.

If your condition is caused by severe medical disorders like Acromegaly or Gigantism, you will need additional therapy (other than orthodontics).

What are the Available Treatments?

Braces are the most common treatment for Prognathism. Orthodontic surgery is the next step. The dentist might need you to wear your braces for some time after surgery.

This treatment is easier for kids in comparison to adults. The surgery may differ according to the severity of the condition.


Author Bio:


Sharon William’s day job is to handle digital marketing for Koch Orthodontics in Loganville, GA. With a flair for creating compelling content that clears the clutter and connects with the audience in an instant, she writes about dental topics to educate and help her readers. She truly believes that a genuine smile can win a million hearts and talks to her readers about improving their smiles and overall dental health, as well as enhancing their overall lifestyle. In her free time, she likes to organize small meets in her neighborhood where she brings people together to discuss various topics that she writes about.

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