1- Department of Oral and Maxillofacial Radiology, Dental School, Shiraz University of Medical Science, Shiraz, Iran
2- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Shiraz University of Medial Science, Shiraz, Iran.
3- Dental school, International Branch, Shiraz University of Medical Science, Shiraz, Iran
Abstract: (4171 Views)
Introdouction: The aim of this study was to
compare information regarding pharyngeal airway
sizes in adolescent subjects with different
malocclusion classes obtained from lateral cephalograms
and 3–dimensional (3D) cone-beam
computed tomography (CBCT) scans.
Materials and methods: In this prospective
cross-sectional study, CBCT scans and lateral
cephalograms of 35 subjects, taken within one
week, were included. Measurements of the
pharyngeal airway area from the lateral cephalograms
and airway volume from the CBCT scans
were analyzed using one-way ANOVA post-hoc
tests were used for comparison of the airway
area and volume in different malocclusion classes.
A linear regression of the airway area to volume
was performed to discern associations and
determine correlation coefficients. Descriptive
statistics for airway dimensions were determined.
Results: No significant differences were detected
between the sexes for any measurement
therefore, all data were combined. Regression
analysis showed that for every mm2 increase in
airway area, there was a corresponding 11.94-
mm3 increase in mean airway volume. One-way
ANOVA and post-hoc tests demonstrated significant
differences in airway area and volume between
the three malocclusion classes (p < 0.001).
The highest mean airway area and volume was
observed in class III malocclusion, followed by
classes I and II malocclusion.
Conclusion: Pharyngeal airway area, as measured
on the lateral cephalogram, concurs with
volumetric data. However, accurate determination
of airway volume and shape is achieved
by 3D imaging, owing to great variability in the
shape of the pharyngeal air space.
Type of Study:
Original article |
Subject:
Radiology Received: 2015/07/4 | Accepted: 2015/07/4 | Published: 2015/07/4