|A prospective CBCT study of upper airway changes after rapid maxillary expansion|
|Zeng, Jingjing; Gao, Xuemei|
|关键词||Rapid maxillary expansion CBCT Nasal cavity Nasopharyngeal airway Oropharyngeal airway Volume|
|刊名||INTERNATIONAL JOURNAL OF PEDIATRIC OTORHINOLARYNGOLOGY|
|WOS标题词||Science & Technology|
|类目[WOS]||Otorhinolaryngology ; Pediatrics|
|研究领域[WOS]||Otorhinolaryngology ; Pediatrics|
|关键词[WOS]||BEAM COMPUTED-TOMOGRAPHY ; OBSTRUCTIVE SLEEP-APNEA ; VOLUME CHANGES ; NASAL CAVITY ; CLINICAL-TRIAL ; CHILDREN ; EXPANDERS ; SKELETAL|
Objective: The aim of this prospective study was to investigate the upper airway changes after rapid maxillary expansion utilizing CBCT.
Methods: 16 children (10 male, 6 female) with a mean age of 12.73 +/- 1.73 years underwent RME as part of their comprehensive orthodontic treatment with4,6-banded hyrax expanders. The screws were activated 2 turns a day. Depending on the expansion amount (2.7-6.3 mm), the activation period ranged from 2 to 3 weeks. CBCT images were taken immediately before (T1) and three months after expansion (T2) in upright position, with patients′ heads kept in consistent position. All CBCT data were processed with the software EZ3D2009. After orienting the CBCT images, a set of linear, area and volumetric parameters of the upper airway were measured and calculated. Student paired t test and one-way ANOVA were applied. The significance level of P < 0.0033 was used according to the Bonferroni correction.
Results: After expansion, with molar-to-molar width increasing 4.4 +/- 1.3 mm and molars tipping 6.2 +/- 6.2 degrees, the nasal floor width and nasal lateral width increased 1.6, +/- 1.5, and 1.6 mm and 1.3, 1.7, and 1.4 mm from the anterior to the posterior part, respectively. And there was no difference among the anterior, median and posterior part. The lower nasal volume increased 1348.5 mm(3) with the percentage change being 8.1%. The pharyngeal airway showed no positive change.
Conclusion: RME can expand the nasal cavity and the expansion pattern may follow the parallel opening configuration. However, the influence on the pharyngeal airway is limited. (C) 2013 Published by Elsevier Ireland Ltd.
|资助机构||Capital Characteristics of Clinical Application Fund|
|作者单位||Peking Univ, Dept Orthodont, Sch & Hosp Stomatol, Beijing 100081, Peoples R China|
|Zeng, Jingjing,Gao, Xuemei. A prospective CBCT study of upper airway changes after rapid maxillary expansion[J]. INTERNATIONAL JOURNAL OF PEDIATRIC OTORHINOLARYNGOLOGY,2013,77(11):1805-1810.|
|APA||Zeng, Jingjing,&Gao, Xuemei.(2013).A prospective CBCT study of upper airway changes after rapid maxillary expansion.INTERNATIONAL JOURNAL OF PEDIATRIC OTORHINOLARYNGOLOGY,77(11),1805-1810.|
|MLA||Zeng, Jingjing,et al."A prospective CBCT study of upper airway changes after rapid maxillary expansion".INTERNATIONAL JOURNAL OF PEDIATRIC OTORHINOLARYNGOLOGY 77.11(2013):1805-1810.|