广东牙病防治2013，Vol.21Issue(2)：96-99,4.
佛山地区青少年骨性Ⅲ类错(牙合)形成机制的8因素分析
Eight factors analysis for the formation mechanism of skeletal Class Ⅲ malocclusion in adolescents of Foshan District
摘要
Abstract
Objective To study the formation mechanism of skeletal Class Ⅲ malocclusion in adolescents by eight factors analysis of the people in Foshan district. Methods Based on FMA angles, the individuals with skeletal Class Ⅲ malocclusion ( ANB ＜ 0° ) were divided into three groups: hyperdivergency group ( FMA ＞ 34° ) , hypodivergency group ( FMA ＜ 24° ) and average group ( 24° ＜ FMA ＜ 34° ). Cephalometric results of hard tissue were analysed by t-test between people of skeletal Class Ⅲ malocclusion and normal people (0° ＜ ANB ＜5°, 24° ＜ FMA ＜34°). Results Comparing with the normal group, there were four results, including mandible body length, mandible angle, maxilla inclination and maxilla body length in the hyperdivergency group, and three results, including mandible body length, mandible angle, lower molar-alveolar height in hypodivergency group, which were significant different. But no difference was found in average group. Conclusion Adolescents of hyperdivergency and hypodivergency skeletal Class Ⅲ malocclusion have more excessive mandibular body length than normal skeletal individual. In hyperdivergency group, maxillas show more anticlockwise rotation, mandibles show more clockwise rotation with retruded maxilla; and hypodivergency group is related with less lower molar-alveolar height and more anticlockwise rotation mandible.关键词
骨性Ⅲ类/因素分析/头影测量Key words
Skeletal Class Ⅲ/ Factors analysis/ Cephalometrics分类
医药卫生引用本文复制引用
余兴华,戴红卫,王增全..佛山地区青少年骨性Ⅲ类错(牙合)形成机制的8因素分析[J].广东牙病防治,2013,21(2):96-99,4.基金项目
佛山市科学技术研究计划项目(2011183) （2011183）
