Prognathism

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Prognathism

 

(underbite, underjet), a type of occlusion, usually congenital, in which the mandibular teeth cover the corresponding maxillary teeth when the jaws are in centric occlusion; the alveolar process of maxilla may be in a correct position or inclined forward (or protruding). The lower jaw protrudes considerably forward; the chin and lower lip protrude prominently, and the upper lip seems to regress. In early childhood, prognathism is corrected by orthodontic methods, and in adults by surgical intervention.


Prognathism

 

in anthropology, facial protrusion in a vertical plane. Facial prognathism is the protrusion of the entire face, while alveolar prognathism is the protrusion of only the alveolar (dental) portion of the upper jaw. Facial prognathism is measured by the facial angle, and alveolar prognathism is measured by the angle of the alveolar portion of the face. Prognathism is more typical of southern Mongoloids and representatives of the Equatorial race, although it also occurs in other racial groups.

References in periodicals archive ?
It is often perceived that mandibular prognathism is associated with growth disturbances in the mandibular body Although the mandibular body and alveolar bone are affected, the primary stimulus creating the deformity is the result of the accelerated and prolonged "normal" growth mechanism of the mandibular condye(s).
Skeletal and dental changes after surgical correction of mandibular prognathism.
He demonstrated frontal bossing, retrognathic premaxilla with relative mandibular prognathism, thin upper lip and a protruding lower lip.