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 ?
1 cm), arched palate, dental crowding, prognathism and joint hypermobility (Beighton 5/9).
The following parameters were analyzed as the indicators of the sagittal position and length of jaws: the angle of maxillary prognathism, the angle of mandibular prognathism, ANB angle as an indicator of sagittal jaw relations, maxillary length (Asnp), and the length of the mandible (Gn-Go).
Our patient had prognathism as well as abnormal dental implantation limiting mouth opening to 3 cm.
calves 2 4 Method of death Euthanasia 2 3 Spontaneous 0 1 Bodyweight, kg 49 [+ or -] 4 39 [+ or -] 3 ([double dagger]) ([section]) Axial musculoskeletal system Defect location Cervical 0 2 Thoracic 0 0 Lumbar 0 0 Type of deviation Lateral 0 2 Dorso-ventral 0 0 Helicoidal 0 0 Appendicular musculo-skeletal system Arthrogryposis 0 3 ([greater than or equal to]1 limb involved) Symetric limb NA 3 involvement Forelimb/hind limb NA 0 involvement Forelimbs only NA 2 Hind limbs only NA 1 Head Coaptation defect Prognathism 0 0 Brachygnathism 0 1 Altered profile Horse-like 0 1 Pig-like 0 0 Broken sagittal axis 0 1 Central nervous system Porencephaly 2 3 Hydranencephaly 1 1 Hydrocephaly 0 0 Cerebellar hypoplasia 0 0 Micromyelia 2 4 Characteristic WBD-2 WBD-3 ([dagger]) ([dagger]) No.
Coarse atypical facies were noticed with a prominent forehead, deep set eyes, broad nasal bridge, wide fleshy nasal tip and mild prognathism as shown in Figure -1a and b.
However, in some cases, no treatment can be usually done in a child with mandibular prognathism until the end of growth spurt since late growth will possibly make Orthodontics treatment uncertain.
Smith's presentation of African-American Jews is ironic to the assumption of nineteenth century ethnology that the Jewish prognathism was the result of the Jew's close racial relationship to or intermixing with blacks in Africa (Gilman 155).
Typically mandibular prognathism has a genetic origin (Fox & Crary 1971).
On the second place was upper prognathism with constriction of the top jaw accompanied by the Gothic form of the palate and dense location of front teeth in 32 cases (16.
He had no history of anterior neck swellings, kyphosis, tongue enlargement, change in voice, increased sweating, prognathism, or visual problems.
They also had a[n] appreciably higher face, giving higher facial indices, a longer base and less prognathism.
The most common reported dysmorphic feature was prognathism.