Micrognathia DefinitionWhen you say Micrognathia it simply means an abnormality in the physical anatomical condition of the person’s lower jaw. The person who has this diagnosis is presented or has a smaller size of the lower mandible or jaw. The smaller size of the mandible or jaw is considered to be abnormal. It is the result of the underdevelopment of the chin or mandible. Some health professionals would term it as a craniofacial anomaly.
Micrognathia Symptoms & SignsMicrognathia usually is evident during infancy. It is the mother who notices this craniofacial anomaly. It is usually noticed when the baby is not feeding well. Along with that are some of the symptoms that the infant may manifest such as:
- Chin Deformity
- Apnea or absent breathing
- Difficulty breathing of Dyspnea
- Abnormally Rapid Breathing pattern
- Abnormal Teeth Alignment
Micrognathia CausesThere are two probable causes why an infant or a newborn has Micrognathia or small jaw. First as being caused by heredity and second, which is associated with other syndromes. There are no other causes of Micrognathia. Person who have been surgically operated or have acquired accidental trauma with their jaw leading to its alterations, such as shortening of the jaw, may not mean that the person can be diagnosed with Micrognathia. This disease condition should occur naturally and not by accidental trauma.
The Micrognathia, as mentioned, can be brought about due to other genetic syndromes such as:
Cri du chat SyndromeIt is a genetic syndrome wherein there is a missing chromosome, particularly chromosome number 5. It has a symptom of Micrognathia.
Marfan SyndromeThis kind of syndrome is a connective tissue disorder that aids in the strengthening of the structure of the person’s body. It also have symptom of Micrognathia.
ProgeriaThis is a rare genetic syndrome that has a symptoms resembling of a normal human aging that occurs in younger children. It also possesses the symptom of Micrognathia.
Russell-Silver SyndromeIt is a disorder of newborn babies having low birth weight, poor growth, short height and abnormally different sizes of the sides of the body. It is has also a symptom of having Micrognathia.
Trisomy 13It is also called Patau Syndrome. It is a genetic syndrome that has three copies of chromosome 13 instead of the normal, which are two copies. There extra chromosome may be attached to other chromosomes which can be termed as translocation. Infants who are diagnosed with this disease condition also manifest Micrognathia.
Trisomy 18It is a genetic disorder of having three copies of the chromosome 18 instead of the normal, which are two copies. Babies who manifest this disease condition will have small jaw or Micrognathia.
Turner Syndrome or XO SyndromeThis genetic condition only occurs in the female babies wherein she lacks the normal two copies of X chromosomes. She only has one copy of the X chromosome. The symptoms of the female baby will manifest having Micrognathia.
Pierre Robin SyndromeThis kind of syndrome which is genetically present at birth manifests a baby having Micrognathia.
Treacher Collins SyndromeIt is a genetic hereditary condition that manifests facial structure problems. It also possesses a symptom of having Micrognathia.
Seckel SyndromeIt is a hereditary disease condition that is characterized with having an unusually small mandible or Micrognathia.
Smith- Lemli- Opitz SyndromeThis is another hereditary syndrome that manifests malformation of the face especially in the mandible which is smaller than normal.
Micrognathia TreatmentThe management of Micrognathia with regarding the respiratory compromise of the infant is very much controversial. In managing this kind of disease condition, you can have many non surgical modalities such as:
- nasopharyngeal airways
- tongue lip adhesion
- prone positioning
- mandibular distraction
- Speech Difficulties
- Teeth Misalignment
Micrognathia SurgeryThe orthodontist is the one that is best physician to go to when an infant or a patient has been diagnosed with this kind of disease condition. For this craniofacial anomaly, there is a need for reconstructive surgery. The extent of the surgery will depend on the configuration degree of an underdevelopment with regards to the surrounding facial bones and muscles.
Upon surgery, what happens is that the mandible or the lower jaw of the patient will go through a bone graft or series of grafting. With this kind of surgical procedure, it is known to rebuild the structure of the abnormal mandible into a normal mandible. The oral surgeon or the maxillofacial surgeon is the only one qualified to do such surgical procedure.
Prior to surgery, preoperative planning, which is an important part in the treatment, must be done by the surgeon himself. In the preoperative planning, the surgeon will determine the distraction area regarding to the location and anatomy of the osteotomies. Usually the curvelinear kind of mandibular distraction is preferred by many.
Micrognathia PicturesHere are some pictures of baby having been diagnosed with Micrognathia:
Picture 2 - Micrognathia in newborn
Picture 3 - Micrognathia with prominent eyes & upper eyelid retraction
Picture 4 - Micrognathia showing cleft lip
Picture 5 - Skull Radiology (X-ray) showing Micrognathia
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