Cone-Beam CT evaluation of upper airway following rapid maxillary expansion and maxillary protraction for the treatment of skeletal class Ⅲ malocclusion
10.3969/j.issn.1001-3733.2016.04.017
- VernacularTitle:上颌快速扩弓联合前方牵引治疗骨性Ⅲ类错牙合畸形对上气道影响的锥形束 CT 分析
- Author:
Hongwei WANG
;
Suqing QI
;
Chao ZHANG
;
Sufeng REN
;
Hongwei HUI
;
Lei LI
;
Jiandong BAN
- Publication Type:Journal Article
- Keywords:
Rapid maxillary expansion(RME);
Maxillary protraction;
Cone-Beam CT(CBCT);
Upper airway
- From:
Journal of Practical Stomatology
2016;32(4):532-536
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To analyze the 3D changes of pharyngeal airway in patients with skeletal Class Ⅲ malocclusion after rapid maxillary expansion(RME)and maxillary protraction.Methods:53 patients underwent orthodontic treatment with Hyrax palatal ex-panders and maxillary protraction.Cone-Beam computed tomography(CBCT)scan was taken before treatment(T0),after 1 6 d RME (T1 )and after about 5 month maxillary protraction(T2).Data were reconstructed into 3D model,sagittal and transversal measure-ments,cross sectional areas,volumes of the pharyngeal airway were computed.Results:After RME,the transversal measurements, cross sectional areas,volumes of nasal passage were increased(P <0.05).After maxillary protraction,the 4 nasopharyngeal measure-ments were increased(P <0.05).Conclusion:RME and maxillary protraction may increase pharyngonasal airway.
