成人骨性Ⅲ类错不同垂直骨面型下颌骨及颏部的比较  

Comparison of mandibular and chin morphology in adults with skeletal Class Ⅲ malocclusion in different vertical facial types

作　　者：舒艳[1] 刘珺[1] 陈杰[1] 范存晖[1] 

机构地区：[1]青岛大学医学院附属医院口腔科,山东青岛266003

出　　处：《上海口腔医学》2011年第2期191-195,共5页Shanghai Journal of Stomatology

摘　　要：目的:比较成人骨性Ⅲ类错不同垂直骨面型下颌骨及颏部形态,探讨下颌平面角与下颌骨及颏部形态的相互关系。方法:选择年龄17～29岁、平均(21±3.020)岁的骨性Ⅲ类错[ANB<0°,平均为(-3.927±2.7637)°]患者60例(男、女各30例)为研究对象,根据下颌平面角(FH-MP)的大小将研究对象分为低角、均角及高角组3组,每组各20例(男、女各10例),分别测量其下颌骨及颏部骨性结构,使用SPSS16.0软件包进行统计学分析。结果:高角组的下颌角、颏高度和颏曲度大于平均角组和低角组(P<0.05);高角组的颏最小厚度、颏最小厚度/颏厚度比、颏厚度/颏高度比和颏角小于平均角组和低角组(P<0.05);进一步经两两比较,下颌角、颏最小厚度、颏最小厚度/颏厚度比、颏高度、颏厚度/颏高度比和颏角在低角组与高角组,平均角组与高角组间均有显著差异(P<0.05);而颏曲度在低角组与高角组有统计学差异(P<0.05)。下颌平面角的大小与下颌角、颏高度和颏曲度呈正相关(P<0.05),而与颏最小厚度、颏最小厚度/颏厚度比、颏厚度/颏高度比和颏角呈负相关(P<0.05)。结论:成人骨性Ⅲ类错不同垂直骨面型下颌骨及颏部形态不同,下颌平面角与下颌骨及颏部形态存在相关关系。PURPOSE： The purpose of this study was to compare the difference of mandibular and chin morphology in adults with skeletal Class Ⅲ malocclusion in different vertical skeletal types,and to find the relationship among them.METHODS： The pretreatment lateral cephalographs of 60 adults（30 males,30 females,with an average age of 21±3.020 years）with skeletal Class Ⅲ malocclusion[ANB0°,average（-3.927±2.7637）°] were selected randomly.They were divided into three groups according to mandibular plane angle： high angle group（20 cases,FH/MP≥32°）,average angle group（20 cases,22°FH/MP32°）and low angle group（20 cases,FH/MP≤22°）.Then the vertical and horizontal craniofacial pattern、mandibular and chin dimensions（angular,linear and proportional measurements） were measured and analyzed statistically using SPSS 16.0 software package.RESULTS： Compared with the low and average angle groups,high angle subjects exhibited increased mandibular angle,chin height and curvature,and decreased chin minimal depth,chin minimal depth /depth ratio,depth/height ratio,chin angle（P〈0.05）.Further comparision of every two groups showed that there was significant difference in mandibular angle,chin minimal depth,chin minimal depth /depth ratio,chin height between low and high angle group,and between average and high angle group（P〈0.05）;There was significant difference in chin curvature between low and high angle group（P〈0.05）.Positive correlation was found between mandibular plane angle and mandibular angle,chin height and curvature,while negative correlation between mandibular plane angle and chin minimal depth,chin minimal depth /height ratio,depth/height ratio,chin angle.CONCLUSIONS： Mandibular and chin morphology are different in adults with skeletal Class Ⅲ malocclusion in different vertical skeletal types,and there is relationship between mandibular plane angle and mandibular and chin morphology,which deserve to be taken into consideration in orthodontic treatment plan.

关 键 词：骨性Ⅲ类错 垂直骨面型 X线头影测量 下颌骨 颏部 

分 类 号：R783.5[医药卫生—口腔医学]