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[The analysis of lip contour of class II division 1 malocclusion in the early permanent dentition]. 2010

Yan Wu, and Xiao Deng, and Song Chen
Dept. of Orthodontics, The Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing 400015, China.

OBJECTIVE To study the lip contour of Class II division 1 malocclusion in the early permanent dentition with different growth patterns and gender. METHODS 145 patients with Class II division 1 malocclusion in the early permanent dentition were included in this study. Their pre-treatment cephalometric X-rays were measured to analyze the influence of gender and growth pattern on the lateral lip contour. One-way analysis of variance was used to analyze the influence of growth pattern on the lip contour of patients in the early permanent dentition, and t-test was used to analyze the influence of gender on the lip contour of patients. RESULTS The lip vertical extension values of male patients were larger than that of female (P < 0.05); the lip sagittal extension value of male seems to be larger too, but no significant difference was found (P > 0.05). The upper lip extension patterns of patients with different growth patterns were the same, but patients of horizontal growth pattern had more everted and protrusive lower lips than patients of vertical growth pattern. CONCLUSIONS Gender and growth pattern both have influences on the lip contour of Class II division 1 malocclusion in the early permanent dentition.

UI MeSH Term Description Entries
D008046 Lip Either of the two fleshy, full-blooded margins of the mouth. Philtrum,Lips,Philtrums
D008297 Male Males
D008310 Malocclusion Such malposition and contact of the maxillary and mandibular teeth as to interfere with the highest efficiency during the excursive movements of the jaw that are essential for mastication. (Jablonski, Illustrated Dictionary of Dentistry, 1982) Angle's Classification,Crossbite,Tooth Crowding,Cross Bite,Angle Classification,Angles Classification,Bite, Cross,Bites, Cross,Classification, Angle's,Cross Bites,Crossbites,Crowding, Tooth,Crowdings, Tooth,Malocclusions
D008312 Malocclusion, Angle Class II Malocclusion in which the mandible is posterior to the maxilla as reflected by the relationship of the first permanent molar (distoclusion). Angle Class II,Angle Class II, Division 1,Angle Class II, Division 2,Class II Malocclusion, Division 1,Class II Malocclusion, Division 2,Malocclusion, Angle Class II, Division 1,Malocclusion, Angle Class II, Division 2,Class II, Angle
D002508 Cephalometry The measurement of the dimensions of the HEAD. Craniometry
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D019229 Dentition, Permanent The 32 teeth of adulthood that either replace or are added to the complement of deciduous teeth. (Boucher's Clinical Dental Terminology, 4th ed) Dentition, Adult,Dentition, Secondary,Adult Dentition,Permanent Dentition,Secondary Dentition

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