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malocclusion
A malocclusion is a misalignment or incorrect relation between the teeth of the two dental arches when they approach each other as the jaws close. The term was coined by Edward Angle, the "father of modern orthodontics",〔Gruenbaum, Tamar. Famous Figures in Dentistry ''Mouth - JASDA'' 2010;30(1):18〕 as a derivative of ''occlusion'', which refers to the manner in which opposing teeth meet (''mal-'' + ''occlusion'' = "incorrect occlusion").
==Presentation==
Malocclusion is a common finding, although it is not usually serious enough to require treatment. Those who have more severe malocclusions may require orthodontic and sometimes surgical treatment (orthognathic surgery) to correct the problem. Correction of malocclusion may reduce risk of tooth decay and help relieve excessive pressure on the temporomandibular joint. Orthodontic treatment is also used to align for aesthetic reasons.
Malocclusions may be coupled with skeletal disharmony of the face, where the relations between the upper and lower jaws are not appropriate. Such skeletal disharmonies often distort sufferer's face shape, severely affect aesthetics of the face and may be coupled with mastication or speech problems. Most skeletal malocclusions can only be treated by orthognathic surgery.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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