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Alternative namesUnder-bite; Receding chin
DefinitionMicrognathia is a relative term describing the small size of the lower jaw.
ConsiderationsIn true micrognathia, the jaw is small enough to interfere with feeding of the infant. Infants with micrognathia may require special nipples in order to feed adequately.
Micrognathia may be the only abnormality in a child, and is often self-correcting during growth, especially at puberty when the jaw grows significantly. It may also be associated with certain inherited disorders and syndromes.
Micrognathia is one cause of abnormal alignment of the teeth. This can be seen by noticing the closure of the teeth. Often there will not be enough room for the teeth to grow and an orthodontist should be consulted when the adult teeth come in. At times, the child can outgrow micrognathia and it makes sense to wait until they are older.
Home CareIf micrognathia interferes with feeding, special feeding techniques and equipment will be required. Techniques can be learned through special programs at most hospitals .
Call your health care provider if
The medical history will be obtained and a physical examination performed.
Medical history questions documenting micrognathia in detail may include:
Diagnostic tests that may be performed are:
Surgery or orthodontic appliances may be recommended.
After seeing your health care provider:
You may want to add a diagnosis related to micrognathia to your personal medical record.
Update Date: 11/10/2003John Goldenring, M.D., MPH, Department of Pediatrics, Children's Hospital, San Diego, CA. Review provided by VeriMed Healthcare Network.
Last updated: Tue, 06 Jan 2009 00:20:03 GMT