Morphological changes in the pharyngeal airway of female skeletal class III patients following bimaxillary surgery: A cone beam computed tomography evaluation

Abstract Using cone beam computed tomography (CBCT), the present study compared three-dimensional (3D) changes in the pharyngeal airway and surrounding tissues in female skeletal class III patients treated with bimaxillary surgery. Twenty-nine female skeletal class III patients with both maxillary h...

Full description

Saved in:
Bibliographic Details
Published in:International journal of oral and maxillofacial surgery 2014-07, Vol.43 (7), p.862-867
Main Authors: Li, Y.-M, Liu, J.-L, Zhao, J.-L, Dai, J, Wang, L, Chen, J.-W
Format: Article
Language:English
Subjects:
Adolescent
Adult
Bimaxillary orthognathic surgery
CBCT
Cone-Beam Computed Tomography
Dentistry
Female
Humans
Hyoid bone
Hyoid Bone - diagnostic imaging
Imaging, Three-Dimensional
Internal Fixators
Malocclusion, Angle Class III - diagnostic imaging
Malocclusion, Angle Class III - surgery
Nasopharynx
Oropharynx
Osteotomy, Le Fort
Pharynx - diagnostic imaging
Skeletal class III malocclusion
Surgery
Treatment Outcome
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Abstract Using cone beam computed tomography (CBCT), the present study compared three-dimensional (3D) changes in the pharyngeal airway and surrounding tissues in female skeletal class III patients treated with bimaxillary surgery. Twenty-nine female skeletal class III patients with both maxillary hypoplasia and a mandibular excess underwent bilateral sagittal split ramus osteotomy for mandibular setback combined with Le Fort I osteotomy for maxillary advancement. Volumetric measurements were performed using CBCT scans taken at 1 week presurgery and 6 months post-surgery. The oropharynx volumes and the cross-sectional area behind the soft palate decreased significantly. There was an insignificant change in the volume of the nasopharynx ( P > 0.05). The hyoid bone moved downward and posteriorly after surgery. The morphology of the soft palate also changed dramatically, with an increase in the length and thickness. Negative correlations were found between the pharyngeal airway space and the position of the hyoid bone. The change in morphology of the soft palate was significantly correlated with the changes in hyoid bone position. These 3D results suggest that bimaxillary orthognathic surgery significantly changes the position of the hyoid bone and the soft palate together with a significant decrease in the pharyngeal airway space in the correction of skeletal class III malocclusion.
ISSN:0901-5027
1399-0020
DOI:10.1016/j.ijom.2014.03.009