摘要
目的探讨不同垂直骨面型骨性Ⅲ类错颌牙弓及牙槽弓宽度的特征。方法根据下颌平面角(∠MP-FH,∠SN-MP)大小选取60例骨性Ⅲ类错颌患者,均分为高、均、低角3组,将患者锥形束CT数据导入Invivo 5.2图像处理软件,测量各组上下颌尖牙、第一前磨牙及第一磨牙处牙弓及牙槽弓宽度,并计算上下颌对应宽度差值,采用单因素方差分析3组牙弓及牙槽弓宽度、Pearson相关性分析骨性Ⅲ类错颌畸形牙弓及牙槽弓横向宽度与下颌平面角关系。结果骨性Ⅲ类错颌上颌第一磨牙间牙弓宽度高角组大于均角组及低角组(P<0.05),下颌第一磨牙间牙槽弓宽度低角组大于高角组及均角组(P<0.05);下颌尖牙间牙弓宽度与下颌平面角呈负相关关系,下颌尖牙牙弓宽度随下颌平面角增大而减小(P<0.05),其余牙位测量项目比较,差异均无统计学(P>0.05)。结论骨性Ⅲ类错颌畸形牙弓、牙槽弓宽度与垂直骨面型存在一定相关性,下颌平面角越大、下颌牙弓前段宽度越窄。
Objective To investigate the relationship between different vertical facial types of skeletal ClassⅢmalocclusion and the width of dental arch and alveolar arch.Methods Sixty patients with skeletal ClassⅢmalocclusion were selected and divided into high angle group,average angle group,and low angle group with 20 cases in each group according to the mandibular plane angle(∠MP-FH,∠SN-MP).Cone beam CT data of all the cases were imported into Invivo 5.2 image processing software and then the width of upper and lower dental arch and alveolar arch were measured.The corresponding width difference between upper and lower jaws was calculated.The one-way ANOVA and Pearson correlation analysis were used for statistical analysis.Results For cases with skeletal ClassⅢmalocclusion,the width of the first maxillary molar arch in high angle group was larger than that in low angle group and average angle group(P<0.05);the width of the first mandibular molar alveolar arch in low angle group was larger than that in higher angle group and average angle group(P<0.05);the width of anterior mandibular arch decreased with the increase of mandibular plane angle(P<0.05);there was no significant difference in other tooth position measurement items(P>0.05).Conclusions There is a certain correlation between the width of dental arch and alveolar arch and the vertical skeletal type in skeletal ClassⅢmalocclusion.The larger the mandibular angle,the narrower the width of the mandibular canine arch.
作者
宋明慧
莫朝伦
张军梅
SONG Minghui;MO Chaolun;ZHANG Junmei(Stomatological Hospital of Guizhou Medial University,Guiyang 550004,Guizhou,China)
出处
《贵州医科大学学报》
CAS
2022年第3期313-317,共5页
Journal of Guizhou Medical University
基金
贵阳市科技局攻关项目基金(筑科合GG字[2015]12)
关键词
锥形束CT
骨性Ⅲ类错颌畸形
垂直骨面型
牙弓宽度
牙槽弓宽度
cone-beam computed tomography(CBCT)
skeletal classⅢmalocclusion
vertical facial type
dental arch width
alveolar arch width
