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Updated: Feb 2, 2026

Noninvasive Sampling of Mucosal Lining Fluid for the Quantification of In Vivo Upper Airway Immune-mediator Levels
Published on: August 7, 2017
[Changes of upper airway in ClassⅡchildren with high mandibular plane angle before and after functional treatment by
Song Xia1, Hong-Wei Dai, Yi Zhang
1Stomatological Hospital of Chongqing Medical University; Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences; Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education. Chongqing 401147, China.
Purpose:
This study was performed to investigate the changes of upper airway before and after functional correction in ClassⅡmalocclusion children with high mandibular plane angle at growth and development peak.
Methods:
Cone-beam CT (CBCT) data of the upper airway were inputted into Minics 17.0 software for measurement of changes in the upper airway before and after functional treatment by high headgear-activator. The changes of upper airway before and after treatment were analyzed with SPSS22.0 software package.
Results:
The change of the total volume of the upper airway, the volume of the velopharynx, glossopharynx, laryngopharynx; the sectional area of the tip of soft palate, roof of the epiglottis, the minimum sectional area of the oropharynx were significant (P<0.05). The upper airway morphology tended to be circular in the soft palate tip plane(P<0.05), but there was no significant difference in the plane of epiglottis(P>0.05).
Conclusions:
High headgear-activator corrected mandibular hypoplasia in children with increased airway volume, increased ventilation, improved respiratory function to prevent occurrence of obstructive sleep apnea hypopnea syndrome after adult.
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