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Evaluations of the tongue and hyoid bone positions and pharyngeal airway dimensions after maxillary protraction treatment

Authors
 Dong-Min Hwang  ;  Ji-Yeon Lee  ;  Yoon Jeong Choi  ;  Chung-Ju Hwang 
Citation
 CRANIO-THE JOURNAL OF CRANIOMANDIBULAR & SLEEP PRACTICE, : epub., 2018 
Journal Title
 CRANIO-THE JOURNAL OF CRANIOMANDIBULAR & SLEEP PRACTICE 
ISSN
 0886-9634 
Issue Date
2018
Keywords
Maxillary protraction ; hyoid bone ; nasopharyngeal airway ; oropharyngeal airway ; tongue
Abstract
Objective To assess changes in the tongue and hyoid bone positions and airway dimensions after maxillary protraction using lateral cephalograms. Methods Lateral cephalograms were obtained before (C0) and after (C1) an observation period for untreated children with skeletal Class I malocclusion and before (T0), immediately after (T1), and one year after (T2) maxillary protraction in children with skeletal Class III malocclusion. Cephalometric measurements were compared between the time points in both patient groups. Results Immediately after maxillary protraction, the tongue moved superiorly and the nasopharyngeal and superior oropharyngeal airway dimensions increased. No significant changes in the middle or inferior oropharyngeal airway dimensions or in the hyoid bone position were noted after treatment. Conclusions Maxillary protraction improved tongue posture and modified the nasopharyngeal and superior oropharyngeal airway dimensions in patients with skeletal Class III malocclusion. Consequently, maxillary protraction may restore the intra- and extraoral balance and improve respiratory function
Full Text
https://www.tandfonline.com/doi/full/10.1080/08869634.2017.1418644
DOI
10.1080/08869634.2017.1418644
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Choi, Yoon Jeong(최윤정) ORCID logo https://orcid.org/0000-0003-0781-8836
Hwang, Chung Ju(황충주) ORCID logo https://orcid.org/0000-0003-3024-4551
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/163740
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