Retrognathia is a type of
malocclusion
In orthodontics, a malocclusion is a misalignment or incorrect relation between the teeth of the upper and lower dental arches when they approach each other as the jaws close. The English-language term dates from 1864; Edward Angle (1855–1 ...
which refers to an abnormal posterior positioning of the
maxilla
In vertebrates, the maxilla (: maxillae ) is the upper fixed (not fixed in Neopterygii) bone of the jaw formed from the fusion of two maxillary bones. In humans, the upper jaw includes the hard palate in the front of the mouth. The two maxil ...
or
mandible
In jawed vertebrates, the mandible (from the Latin ''mandibula'', 'for chewing'), lower jaw, or jawbone is a bone that makes up the lowerand typically more mobilecomponent of the mouth (the upper jaw being known as the maxilla).
The jawbone i ...
,
particularly the mandible, relative to the facial skeleton and soft tissues.
A retrognathic mandible is commonly referred to as an
overbite, though this terminology is not used medically.
See also
*
Micrognathism
*
Prognathism
Prognathism is a positional relationship of the mandible or maxilla to the skeletal base where either of the jaws protrudes beyond a predetermined imaginary line in the coronal plane of the skull.
In the case of ''mandibular'' prognathism (nev ...
References
External links
Diagram at brooksideorthodontics.com - see Classification of Face:Class 2 section
Jaw disorders
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