应用锥形束CT比较骨性Ⅲ类高角(牙合)与正常(牙合)成人上气道形态和舌骨位置的意义

doi:10.13481/j.1671-587x.20190427

Abstract

Abstract: Objective:To analyze the differents in the upper airway morphology and hyoid position between skeletal class Ⅲ malocclusion of high-angle and normal occlusion by cone beam CT(CBCT), and to study the influence of skeletal class Ⅲ malocclusion of high-angle in the upper airway and hyoid position of the adults preliminarily. Methods:A total of 42 adults in Department of Orthodontics, Dalian Stomatology Hospital were chosen, including 21 adults with skeletal class Ⅲ malocclusion of high-angle and 21 adults with normal occlusion. MIMICS 20.0 software was used to measure the line spacing, cross-sectional area and volume of each upper airway segment and line distance of hyoid of the patients on CBCT; SPSS 20.0 software was used for statistical analysis. Results:Compared with normal occlusion group, the maximum lateral distance (LAT1) of the nasopharynx, the maximum anterior-posterior distance (AP2) of the velopharyngeal, and the volume of the velopharyngeal (VOL2) of the patients in skeletal class Ⅲ malocclusion of high-angle group were increased (P<0.05). Compared with normal occlusion group, the maximum lateral distance of the glossopharynx and laryngopharynx (LAT3 and LAT4), the cross-sectional area of the laryngopharynx (CSA4) and the volume of the laryngopharynx (VOL4) of the patients in skeletal class Ⅲ malocclusion of high-angle group were decreased (P<0.05). While no statistically significant difference was found in the position of the hyoid bone that had a tendency to shift forward and upward of the patients in skeletal class Ⅲ malocclusion of high-angle group compared with normal occlusion group (P>0.05). Conclusion:Cross-sectional area and volume of velopharyngeal have the tendency of increase, but cross-sectional area and volume of laryngopharynx have the tendency of decrease in the patients with skeletal class Ⅲ malocclusion of high-angle. The hyoid bone has a tendency to shift forward and upward in the patients with skeletal class Ⅲ malocclusion of high-angle.

Key words: cone beam CT, skeletal class Ⅲ malocclusion of high-angle, normal occlusion, upper airway, hyoid

CLC Number:

R783

MEI Donglan, HAN Lichi, YAN Zhenmei, HUANG Hongwei. Significance of comparison in upper airway morphology and hyoid position between skeletal class Ⅲ malocclusion of high-angle and normal occlusion of adults by cone beam CT[J].Journal of Jilin University(Medicine Edition), 2019, 45(04): 899-904.

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Significance of comparison in upper airway morphology and hyoid position between skeletal class Ⅲ malocclusion of high-angle and normal occlusion of adults by cone beam CT

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