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==Presentation==
[[Image:Mandibular prognathism pre-surgery.png|thumb|left|Mandibular prognathism, where teeth have almost reached their final, straight position by [[dental braces]]. This makes the prognathism more obvious, and it will take an operation, moving the jaw backwards, to give the ultimate result.]]
Prognathism in humans can occur due to normal variation among [[phenotypes]]. In human populations where prognathism is not the norm, it may be a malformation, the result of injury, a disease state, a hereditary condition,<ref>{{MedlinePlusEncyclopedia|003026|Prognathism}}</ref> or, if not pathological, may simply be a minority trait within a population.<ref>Though prognathism is not the norm among white Americans, white Americans can occasionally have non-pathological prognathism, similar to that of other populations around the world in which prognathism is the norm, and clearly distinct from the examples of pathological prognathism shown in the pictures.</ref>
Prognathism is considered a disorder only if it affects [[chewing]], [[Manner of articulation|speech]] or social function as a byproduct of severely affected aesthetics of the face.{{citation needed|date=September 2018}}
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