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  1. Home
  2. Health Library
  3. Symptoms
  4. Micrognathia

Micrognathia

Symptoms

Micrognathia is a term for a lower jaw that is smaller than normal.

In some cases, the jaw is small enough to interfere with the infant's feeding. Infants with this condition may need special nipples in order to feed properly.

Micrognathia often corrects itself during growth. The jaw may grow a lot during puberty. The problem can be caused by certain inherited disorders and syndromes.

Micrognathia can cause the teeth not to align properly. This can be seen in the way the teeth close. Often there will not be enough room for the teeth to grow.

Children with this problem should see an orthodontist when the adult teeth come in. Because children may outgrow the condition, it often makes sense to delay treatment until a child is older.

Micrognathia may be part of other genetic syndromes, including:

  • Cri du chat syndrome
  • Hallerman-Streiff syndrome
  • Marfan syndrome
  • Pierre Robin syndrome
  • Progeria
  • Russell-Silver syndrome
  • Seckel syndrome
  • Smith-Lemli-Opitz syndrome
  • Treacher-Collins syndrome
  • Trisomy 13
  • Trisomy 18
  • XO syndrome (Turner syndrome)

Home Care

You may need to use special feeding methods for a child with this condition. Most hospitals have programs where you can learn about these methods.

When to Contact a Medical Professional

Contact your health care provider if:

  • Your child seems to have a very small jaw
  • Your child has trouble feeding properly

What to Expect at Your Office Visit

The provider will do a physical exam and may ask questions about the problem. Some of these may include:

  • When did you first notice that the jaw was small?
  • How severe is it?
  • Does the child have trouble eating?
  • What other symptoms are present?

The physical exam will include a thorough check of the mouth.

The following tests may be performed:

  • Dental x-rays
  • Skull x-rays

Depending on the symptoms, a child may need to be tested for an inherited condition that may be the source of the problem. The child may need surgery or devices to correct tooth position.

References

Evans K, Hing AV, Cunningham M. Craniofacial and orthopedic conditions. In: Gleason CA, Devaskar SU, eds. Avery's Diseases of the Newborn. 9th ed. Philadelphia, PA: Elsevier Saunders; 2012:chap 95.

Hartsfield JK, Cameron AC. Acquired and developmental disturbances of the teeth and associated oral structures. In: Dean JA, ed. McDonald and Avery's Dentistry of the Child and Adolescent. 10th ed. St Louis, MO: Elsevier; 2016:chap 3.

BACK TO TOP

Review Date: 4/24/2017

Reviewed By: Liora C. Adler, MD, Pediatric Emergency Medicine, Joe DiMaggio Children's Hospital, Hollywood, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

 
 
 

 

 

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