骨性Ⅲ类与Ⅰ类患者面部骨骼对称性的锥形束CT影像学初步研究  

A preliminary study of skeletal symmetry in patients with skeletal Class Ⅲ and Class Ⅰ malocclusions based on Cone-Beam CT images

作　　者：丛超[3] 梁成[2] 谷岩[1] 

机构地区：[1]北京大学口腔医院第二门诊部正畸科 [2]北京大学口腔医学院·口腔颌面外科,北京100081 [3]北京大学口腔医学院·口腔医院正畸科,北京100081

出　　处：《中华口腔正畸学杂志》2015年第4期206-210,共5页Chinese Journal of Orthodontics

摘　　要：目的 基于锥形束CT影像资料比较面部基本对称骨性Ⅲ类与骨性Ⅰ类患者骨骼对称性的差异,探讨骨性Ⅲ类患者面部骨骼对称性与ANB角度的相关性.方法 按筛查标准筛查2012～2013年度于北京大学口腔医院就诊并拍摄大视野CBCT的面部基本对称患者的影像资料,根据ANB角度（2.7°±2.0°）分为骨性Ⅲ类组（26例）与骨性Ⅰ类组（19例）.运用Dophlin 11.7软件对患者的锥形束CT影像资料进行定点,测量其不对称系数.应用Medclac软件进行数据的统计分析.结果 骨性Ⅲ类与骨性Ⅰ类患者各骨性标志点不对称系数无统计学差异（P＞0.05）;骨性Ⅲ类患者骨性标志点不对称系数与ANB角度之间无相关性（P＞0.05）.结论 面部基本对称骨性Ⅲ类与骨性Ⅰ类患者骨骼对称性无显著性差异;ANB角度与面部骨骼不对称系数之间无相关关系.Objective Compare the difference of skeletal symmetry between Class Ⅲ and Class Ⅰ facial symmetry patients based on CBCT images.Evaluate the correlation between ANB angle and skeletal symmetry in patients with Class Ⅲ and Class Ⅰ malocclusions.Methods The samples were collected from the patients in Dept.of orthodontics, Peking University School of Stomatology from 2012～2013 according to the inclusion and exclusion criteria in the current study.According to the ANB angle, the samples were divided into two groups： the Class Ⅲ group （26 subjects） and the Class Ⅰ group （19 subjects）.We used Dolphin 11.7 to determine the anatomic landmarks and calculated the landmarks＇ asymmetry index （AI）.The data analysis was performed by Medclac software.Results No significant difference on skeletal landmarks asymmetry index was found in facial symmetric patients with skeletal Class Ⅰ and Class Ⅲ malocclusions （P〉0.05）.With the decrease of ANB angle, no significant increase of asymmetry index was noted （P〉0.05）.Conclusions No difference on skeletal asymmetry was found in facial symmetric patients with skeletal Class Ⅰ and Class Ⅲ malocclusions;No correlation between ANB angle and asymmetry index.

关 键 词：锥形束CT 骨性Ⅰ类 骨性Ⅲ类 ANB角 不对称系数 

分 类 号：R783.5[医药卫生—口腔医学]