三类骨性错牙合  下颌牙弓和基骨弓的测量及相关性分析

doi:10.13418/j.issn.1001-165x.2016.02.011

Abstract

Abstract:

Objective 　To investigate the differences and correlations between the mandibular dental and basal arch forms in subjects with normal occlusion and those of skeletal malocclusions. 　Methods　Virtual pretreatment mandibular models of patients (27 Class I,30 Class II, 20 Class III and 27 normal occlusion) were selected to measure widths and lengths of dental and basal arch. The differences and correlations between indicators were analyzed, and then fitting curves of dental and basal arch were made.Results　The mandibular basal arch widths and lengths were significantly greater in the Class III group compared to other groups, the dental arch widths were significantly greater in the Class Ⅲ group compared to the Class II group, the anterior dental lengths were significantly greater in the Class Ⅱ group compared to other groups. The widths in canine, molar regions and the whole arch lengths of dental and basal arch demonstrated high correlation coefficient (r=0.818, 0.836, 0.818), the anterior arch lengths demonstrated low correlation coefficient(r=0.395).　Conclusions　The basal arch of Class III group is overgrown, while the anterior arch lengths of Class II group are largest to cover its basal arch hypoplasia. The dental and basal arch demonstrates correlation.

Key words: Skeletal , malocclusion, Dental arch form, Basal arch form, Curve fitting

LIN Si-dou,WU Bu-lin,SUN Feng-yang,TIAN Zhi-hui,ZHONG En-yi,CI Bo-wen,HUANG Wen-hua. Measurementand correlation analysis between the mandibular dental and basal arch forms in three skeletalmalocclusions[J]. Chinese Journal Of Clinical Anatomy, 2016, 34(2): 171-175.

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Measurementand correlation analysis between the mandibular dental and basal arch forms in three skeletalmalocclusions

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