K-mean cluster analysis for incisal jaw morphology of normal occlusion subjects among different vertical facial skeletal types

To study the incisal jaw morphology of subjects with normal occlusion and to discuss the relationship between different vertical facial skeletal types and different incisal jaw cluster types. After studied by radiographic cephalometry, the incisal jaw morphology of 169 subjects with normal occlusion...

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Bibliographic Details
Published inHua xi kou qiang yi xue za zhi Vol. 23; no. 4; p. 299
Main Authors Sun, Wei, Zhou, Li, Bai, Ding, Zhao, Mei-Ying
Format Journal Article
LanguageChinese
Published China 01.08.2005
Subjects
Cephalometry
Dental Occlusion
Dentition, Permanent
Face
Humans
Incisor
Mandible
Maxilla
Skull
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Summary:To study the incisal jaw morphology of subjects with normal occlusion and to discuss the relationship between different vertical facial skeletal types and different incisal jaw cluster types. After studied by radiographic cephalometry, the incisal jaw morphology of 169 subjects with normal occlusion in early permanent dentition were analyzed by K-mean cluster analysis. Morphology of maxillary or mandibular incisal jaws could be divided into four types separately, including division I, division II, division III and division N. In maxilla or in mandible, the incisal jaw morphology of division I was characterized by wideness and shortness. In contrast, division II was characterized by thinness and length. As for division III and division IV, both of two were intermediate types between division I and division II . In maxilla, it was found that division II was the majority (86.49%) in the high-angle subjects, division III was the majority (47.67%) in the average-angle subjects, and division I and III were the majo
ISSN:1000-1182