A study on the chin soft and hard tissue morphology of different vertical skeletal types of Class Ⅱ1 in han and uyghur adult females in Xinjiang
10.3969/j.issn.1001-3733.2025.01.018
- VernacularTitle:新疆维汉民族成人女性Ⅱ类1分类不同垂直骨面型颏部软硬组织形态的研究
- Author:
Zihan WANG
1
;
Jinrui XU
1
;
Wanyu ZHU
1
;
Xiaoyu SHI
1
;
Jie YANG
1
;
Jing NIE
1
Author Information
1. 830054 乌鲁木齐,新疆医科大学第一附属医院(附属口腔医院)口腔正畸科,新疆维吾尔自治区口腔医学研究所
- Publication Type:Journal Article
- Keywords:
Skeletal class Ⅱ;
Vertical skeletal types;
Morphometric of the chin
- From:
Journal of Practical Stomatology
2025;41(1):110-117
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the morphological characteristics and ethnic differences of the chin soft and hard tissue of Han and Uyghur adult females of class Ⅱ 1.Methods:90 Uyghur and Han female subjects of class Ⅱ 1 aged 18-35 years old were enrolled and respectively divided into 3 groups according to the vertical skeletal types:high,average and low angle groups(n=30).The various indexes of the chin soft and hard tissue of the subjects were measured by X-ray lateral cephalic radiographs.The data were statisti-caly analyzed.Results:(1)The Po-Pos of the Han subjects with high angle was higher than that of those with low and average an-gle;the minimum chin thickness,the ratio of the chin thickness to the chin height,the ratio of the minimum chin thickness to the chin thickness and the angle of chin in the high angle group were smaller than those in the average angle group and the low angle group(P＜0.05).The chin height,the chin depression and the cervical-mandibular angle of the Uyghur subjects with high angle were higher than those of the Uyghur subjects with low angle and average angle;the minimum chin thickness,the ratio of the chin thickness to the chin height and the ratio of the minimum chin thickness to the chin thickness in the high angle group were smaller than those in the average and the low angle groups(P＜0.05).(2)In the low angle group,there were significant differences in the angle of chin,cervical-mandibular angle,soft tissue chin angle and Me-Mes between the 2 ethnic groups(P＜0.05).In the average angle group,there were significant differences in the height of chin,LI-LL and Me-Mes between the 2 ethnic groups(P＜0.05).In the high angle group,there were significant differences in the ratio of anterior to posterior chin thickness,in the angle of chin,LL-Pos and Po-Pos between the 2 ethnic groups(P＜0.05).(3)The positive correlation between FH/MP and Po-Pos,cervical-mandib-ular angle,chin depression,chin lip angle,chin height,ratio of anterior and posterior chin thickness and LL-Pos were found in Han and Uyghur subjects(P＜0.05).Mentolabial sulcus,the chin thickness,the ratio of the chin thickness to the chin height,the angle of chin and the ratio of the minimum chin thickness to the chin thickness were negatively correlated with FH/MP in both ethnic groups(P＜0.05).Conclusion:Han and Uy-ghur adult females of class Ⅱ 1 have different chin soft and hard tissue morphology in different vertical skeletal types with certain differences between the ethnic groups in the same vertical skeletal types,and there is a correlation between the chin soft and hard tis-sue morphology of different vertical skeletal types and the vertical skeletal types in Han and Uyghur adult females of class Ⅱ 1.
