TY - JOUR
T1 - Two- and three-dimensional evaluation of the upper airway after bimaxillary correction of Class III malocclusion
AU - Jakobsone, Gundega
AU - Neimane, Laura
AU - Krumina, Gaida
N1 - Funding Information:
This work was supported in part by grant 05.1841 from the Latvian Council of Science .
PY - 2010
Y1 - 2010
N2 - Objective: The aim the study was to evaluate area and volumetric changes in the upper airway after bimaxillary correction of Class III malocclusion by the means of computer tomography (CT), and to compare these to the changes in linear measurements from lateral cephalograms. Study design: This was a prospective clinical trial. Lateral cephalograms and CT scans of 10 Class III patients were evaluated 1 week before and 6 months after surgery. Wilcoxon matched pairs signed ranks test was used to determine the differences in measurements pre- and postoperatively. Spearman's rank correlation was used to test the association between the CT and cephalometric measurements. Results: CT measurements: The oropharyngeal and hypopharyngeal volumes increased by 3.98 ± 4.18 cm 3 (P = .015) and 2.51 ± 1.92 cm3 (P = .021), respectively. The total volume of the posterior airway space increased, but the increase was not statistically significant. After surgery no change in the cross-sectional area of the upper airway was recorded at the retropalatal, oropharyngeal, or hypopharyngeal levels. Cephalometric measurements: The nasopharyngeal space increased 4.08 ± 5.07 mm (P = .039) and the tongue increased in length by 4.84 ± 5.93 mm (P = .22). No correlation was found between the measurements on CT scans and corresponding measurements on the lateral cephalograms. Conclusions: Bimaxillary surgery for correction of Class III malocclusion did not cause decrease of the posterior airway space. Three-dimensional imaging techniques are preferable to 2-dimensional lateral cephalograms for evaluation of the upper airway after orthognathic procedures.
AB - Objective: The aim the study was to evaluate area and volumetric changes in the upper airway after bimaxillary correction of Class III malocclusion by the means of computer tomography (CT), and to compare these to the changes in linear measurements from lateral cephalograms. Study design: This was a prospective clinical trial. Lateral cephalograms and CT scans of 10 Class III patients were evaluated 1 week before and 6 months after surgery. Wilcoxon matched pairs signed ranks test was used to determine the differences in measurements pre- and postoperatively. Spearman's rank correlation was used to test the association between the CT and cephalometric measurements. Results: CT measurements: The oropharyngeal and hypopharyngeal volumes increased by 3.98 ± 4.18 cm 3 (P = .015) and 2.51 ± 1.92 cm3 (P = .021), respectively. The total volume of the posterior airway space increased, but the increase was not statistically significant. After surgery no change in the cross-sectional area of the upper airway was recorded at the retropalatal, oropharyngeal, or hypopharyngeal levels. Cephalometric measurements: The nasopharyngeal space increased 4.08 ± 5.07 mm (P = .039) and the tongue increased in length by 4.84 ± 5.93 mm (P = .22). No correlation was found between the measurements on CT scans and corresponding measurements on the lateral cephalograms. Conclusions: Bimaxillary surgery for correction of Class III malocclusion did not cause decrease of the posterior airway space. Three-dimensional imaging techniques are preferable to 2-dimensional lateral cephalograms for evaluation of the upper airway after orthognathic procedures.
UR - http://www.scopus.com/inward/record.url?scp=77955415914&partnerID=8YFLogxK
U2 - 10.1016/j.tripleo.2010.03.026
DO - 10.1016/j.tripleo.2010.03.026
M3 - Article
C2 - 20580280
AN - SCOPUS:77955415914
SN - 1079-2104
VL - 110
SP - 234
EP - 242
JO - Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology
JF - Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology
IS - 2
ER -