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Maxillofacial Plastic and Reconstructive Surgery

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Open Access 01-12-2016 | Research

Change of the airway space in mandibular prognathism after bimaxillary surgery involving maxillary posterior impaction

Authors: Woo-Young Lee, Young-Wook Park, Kwang-Jun Kwon, Seong-Gon Kim

Published in: Maxillofacial Plastic and Reconstructive Surgery | Issue 1/2016

Abstract

Background

The purpose of this retrospective study was to develop a two- and three-dimensional analysis of the airway using cone-beam computed tomography (CBCT) and to determine whether the airway space would be changed in mandibular prognathism after bimaxillary surgery involving maxillary posterior impaction.

Methods

Patients requiring orthognathic surgery from 2012 to 2014 were recruited for this study. CBCT scans were obtained at three points: preoperatively (T0), immediate postoperatively (T1), and after 6 months postoperatively (T2). The nasopharynx, oropharynx, and hypopharynx were measured on the CBCT scan for each patient in a repeatable manner. With the midsagittal plane, linear measurements in the middle of each were obtained. For the CBCT, volumetric measurements of each and total airway were obtained.

Results

A total of 22 consecutive patients (11 men and 11 women) were included in the present study. The total volume was significantly reduced (p < .001). However, the change of the diameter and volume of the nasopharynx was not statistically significant (p = .160, p = .137, respectively). In the oropharynx, the change of both the diameter and volume showed statistical significance between preoperatively and immediate postoperatively (p < .001, p = .001, respectively) and also preoperatively and after 6 months postoperatively (p = .001, p = .010, respectively). In the hypopharynx, the change of both the diameter and volume showed statistical significance between preoperatively and immediate postoperatively (p = .001, p < .001, respectively) and also preoperatively and after 6 months postoperatively (p = .001, p < .001, respectively).

Conclusions

The bimaxillary surgery involving maxillary posterior impaction can reduce the volume of airway in the patients of mandibular prognathism. Although total airway volume was reduced significantly, the changes in the volume and diameter of the nasopharynx were not statistically significant. The maxillary posterior impaction affects on the nasopharyngeal airway minimally.

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Title: Change of the airway space in mandibular prognathism after bimaxillary surgery involving maxillary posterior impaction
Authors: Woo-Young Lee
Young-Wook Park
Kwang-Jun Kwon
Seong-Gon Kim
Publication date: 01-12-2016
Publisher: Springer Berlin Heidelberg
Published in: Maxillofacial Plastic and Reconstructive Surgery / Issue 1/2016
Electronic ISSN: 2288-8586
DOI: https://doi.org/10.1186/s40902-016-0071-3

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Springer Medicine

Change of the airway space in mandibular prognathism after bimaxillary surgery involving maxillary posterior impaction

Abstract

Background

Methods

Results

Conclusions

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

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