CBCT study of three-dimensional morphological characteristics of upper airway in children and adolescents with skeletal class Ⅲ malocclusion
10.12016/j.issn.2096-1456.2019.03.006
- Author:
CHEN Qiaoyun
1
;
PENG Youjian
1
Author Information
1. Department of Stomatology, Renmin Hospital of Wuhan University
- Publication Type:Journal Article
- Keywords:
Upper airway;
Skeletal class Ⅲ occlusion;
Malocclusion;
Cone beam computed tomography;
Obstructive sleep apneahypopnea syndrome
- From:
Journal of Prevention and Treatment for Stomatological Diseases
2019;27(3):172-177
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the three-dimensional morphological characteristics of the upper airway in children and adolescents with skeletal class Ⅲ malformation and to explore the relationship between craniofacial structure and upper airway morphology.
Methods :Ninety cases of malocclusion aged 3-18 years were collected. In addition, 45 cases of type I and type Ⅲ were classified into three age groups with 15 cases in each group: 3-6 years old, 7-12 years old and 13-18 years old. CBCT was taken, and the scanning data of CBCT were reconstructed by the third-party software Invivo 5. The volume, minimum cross-sectional area, height and the ratio of sagittal diameter to transverse diameter at the minimum cross-sectional area of each segment of the upper airway were measured. The difference of the upper airway between skeletal class I and skeletal class Ⅲ in each age group was analyzed and compared by group t test.
Results : No significant differences in the upper airway indexes were noted between skeletal class I and skeletal class Ⅲ(P > 0.05) in the 3-6 years old group. In the 7-12 years old group, the total volume of skeletal class Ⅲ upper airway (16.25 ± 3.69 cm 3), nasopharyngeal segment (2.39 ± 0.90 cm 3), and palatopharyngeal segment (5.24 ± 1.14 cm 3) were reduced compared with the total volume of the skeletal class I upper airway (20.98 ± 6.25 cm 3) , nasopharyngeal segment (4.21 ± 1.09 cm 3), and palatopharyngeal segment (8.18 ± 2.02 cm 3), respectively, the differences were statistically significant (tVtotal=2.526, tVnose=4.999, tVpalate=4.908, P < 0.05). In the 13-18 years old group, only nasopharyngeal segment volume (3.83 ± 0.90 cm 3) was reduced in skeletal type I (4.69 ± 1.34 cm 3); the difference was statistically significant (t=2.053, P < 0.05).
Conclusion: Age is an important factor affecting the morphology and structure of upper airway in skeletal Ⅲ malocclusion.
- Full text:骨性Ⅲ类错頜畸形儿童和青少年上气道三维形态特征的CBCT研究.pdf
