The effect of anterior traction orthodontic treatment on adolescent patients with bone type Ⅲ malocclusion of different bone ages
10.3760/cma.j.cn431274-20240805-01196
- VernacularTitle:不同骨龄青少年骨性Ⅲ类错 畸形患者进行前牵引矫治的效果
- Author:
Lina WANG
1
;
Liping YAN
1
;
Shan GAO
1
Author Information
1. 张家口市第一医院口腔科，张家口 075000
- Publication Type:Journal Article
- Keywords:
Adolescent;
Bone age;
Skeletal class Ⅲ malocclusion;
Orthodontic extrusion
- From:
Journal of Chinese Physician
2025;27(4):537-541
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the effect of anterior traction orthodontic treatment in adolescents with bone type Ⅲ malocclusion of different bone ages.Methods:Two hundred patients with bony class Ⅲ malocclusion admitted to the Department of Stomatology of the Zhangjiakou First Hospital were prospectively selected as the research subjects; An experienced physician divided the research subjects into the Cvs1 stage group ( n=54), the Cvs2 stage group ( n=56), the Cvs3 stage group ( n=47), and the Cvs4 stage group ( n=43) based on the morphological changes of the second, third, and fourth cervical vertebrae in the modified cervical spine analysis method. Before and after orthodontic treatment, X-ray lateral cranial films were taken respectively to compare the indicators of the upper airway and the structural indicators of the temporomandibular joint. Results:The nasopharyngeal volume (NPvolume), nasopharyngeal minimum cross-sectional area (NParea), and nasopharyngeal minimum cross-sectional sagittal diameter (NPsag) of the four groups of adolescents after treatment all increased significantly compared with those before treatment (all P<0.05), especially the increase was the most obvious in the Cvs3 stage group ( P<0.05). In the Cvs1 stage group, Cvs2 stage group, and Cvs3 stage group, except for the Y-axis to Mandibular first molar (Y-Mn6), Overbite, and the ratio of the Angle between the Posterior maxillary vertical to Occlusal plane angle (PMV/OP), there was no statistically significant difference before and after treatment (all P>0.05). The differences in other items before and after treatment were statistically significant (all P<0.05). Conclusions:Anterior traction orthodontic treatment has a significant effect on adolescents of different bone ages with skeletal class Ⅲ malocclusion, and can improve the maxillofacial structure and the position of the temporomandibular joint. There are differences in therapeutic effects among different bone age groups, and the effect of the Cvs3 stage group is the most obvious. These results provide important reference basis for clinical treatment decisions.
