Retrognathia
Definition:
Retrognathia
Subjective: Posteriorly positioned lower jaw, which is set back from the plane of the face when viewed from the side but not from the front
Comments: This feature may be accompanied by micrognathia (microretrognathia) in which case both retrognathia and micrognathia should be specified and coded separately. Alternatively, it may be a mismatch in the relative position of the mandible and premaxilla, with normal mandibular length and premaxillary prominence and is accompanied by a class II malocclusion.
Synonyms:
- Chin, Retruded
- Mandible, Retruded
- Retrognathism
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