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Prognathism
Prognathism

Prognathism
Definition:

Prognathism is a protrusion of the jaw (mandible) due to misalignment of teeth caused by malformations of the shape of the bones of the face.
Alternative Names:
Extended chin

Considerations:

Prognathism may cause malocclusion (misalignment of the biting surfaces of the upper and lower teeth), giving some people an angry or fighter's appearance. Prognathism may be a symptom of various syndromes or conditions.
Common Causes:
Home Care:

It is appropriate to see a dentist or orthodontist to treat abnormal alignment of the jaw and teeth. However, also contact your primary health care provider to rule out medical disorders that can be associated with prognathism.
Call your health care provider if:
  • there is difficulty talking, biting, or chewing related to the abnormal jaw alignment.
  • you have concerns about jaw alignment
What to expect at your health care provider's office:

The medical history will be obtained and a physical examination performed.

Medical history questions documenting prognathism in detail may include:

  • Is there any family history of an unusual jaw shape?
  • Is there difficulty talking, biting, or chewing?
  • What other symptoms are also present?

Physical examination will include a detailed examination of the mouth and jaw, and examination for signs of disorders that can be associated with prognathism.

Diagnostic tests may include:

After seeing your health care provider:
You may want to add a diagnosis related to prognathism to your personal medical record.
Review Date: 5/14/2002
Reviewed By: Adam Ratner, M.D., Children's Hospital of Philadelphia, Philadelphia, PA. Review provided by VeriMed Healthcare Network.
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