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

Dong Min Hwang, Ji Yeon Lee, Yoon Jeong Choi, ChungJu Hwang

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)214-222
Number of pages9
JournalCranio - Journal of Craniomandibular Practice
Volume37
Issue number4
DOIs
Publication statusPublished - 2019 Jul 4

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Hyoid Bone
Malocclusion
Tongue
Cephalometry
Posture
Therapeutics
Observation

All Science Journal Classification (ASJC) codes

  • Otorhinolaryngology
  • Dentistry(all)

Cite this

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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.",
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Evaluations of the tongue and hyoid bone positions and pharyngeal airway dimensions after maxillary protraction treatment. / Hwang, Dong Min; Lee, Ji Yeon; Choi, Yoon Jeong; Hwang, ChungJu.

In: Cranio - Journal of Craniomandibular Practice, Vol. 37, No. 4, 04.07.2019, p. 214-222.

Research output: Contribution to journalArticle

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N2 - 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.

AB - 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.

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