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Volumetric changes in the upper airway after bimaxillary surgery for skeletal class III malocclusions: a case series study using 3-dimensional cone-beam computed tomography.
J Oral Maxillofac Surg. 2012 Dec; 70(12):2867-75.JO

Abstract

PURPOSE

Postsurgical changes of the airway have become a great point of interest and often have been reported to be a predisposing factor for obstructive sleep apnea after mandibular setback surgery. The purpose of this study was to evaluate the 3-dimensional volumetric changes in the upper airway space of patients who underwent bimaxillary surgery to correct Class III malocclusions.

MATERIALS AND METHODS

This study was performed retrospectively in a group of patients who underwent bimaxillary surgery for Class III malocclusion and had full cone-beam computed tomographic (CBCT) images taken before surgery and 1 day, 3 months, and 6 months after surgery. The upper and lower parts of the airway volume and the diameters of the airway were measured from 2 different levels. Presurgical measurements and the amount of surgical correction were evaluated for their effect on airway volume. Data analyses were performed by analysis of variance and multiple stepwise regression analysis.

RESULTS

The subjects included 21 patients (6 men and 15 women; mean age, 22.7 yrs). The surgeries were Le Fort I impaction (5.27 ± 2.58 mm impaction from the posterior nasal spine) and mandibular setback surgery (9.20 ± 4.60 mm set back from the pogonion). No statistically significant differences were found in the total airway volume for all time points. In contrast, the volume of the upper part showed an increase (12.35%) and the lower part showed a decrease (14.07%), with a statistically significant difference 6 months after surgery (P < .05). Predictor variables affecting the upper and lower parts of the airway volume were presurgical A point to Nasion-perpendicular (A to N-perp) and vertical surgical correction of the pogonion and the posterior nasal spine (P < .05).

CONCLUSIONS

Bimaxillary surgery for the correction of Class III malocclusion affected the morphology by increasing the upper part and decreasing the lower part of the airway, but not the total volume.

Authors+Show Affiliations

Division of Orthodontics, Department of Dentistry, School of Medicine, Ewha Womans University, Seoul, Korea.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22682739

Citation

Lee, Yoonjung, et al. "Volumetric Changes in the Upper Airway After Bimaxillary Surgery for Skeletal Class III Malocclusions: a Case Series Study Using 3-dimensional Cone-beam Computed Tomography." Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons, vol. 70, no. 12, 2012, pp. 2867-75.
Lee Y, Chun YS, Kang N, et al. Volumetric changes in the upper airway after bimaxillary surgery for skeletal class III malocclusions: a case series study using 3-dimensional cone-beam computed tomography. J Oral Maxillofac Surg. 2012;70(12):2867-75.
Lee, Y., Chun, Y. S., Kang, N., & Kim, M. (2012). Volumetric changes in the upper airway after bimaxillary surgery for skeletal class III malocclusions: a case series study using 3-dimensional cone-beam computed tomography. Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons, 70(12), 2867-75. https://doi.org/10.1016/j.joms.2012.03.007
Lee Y, et al. Volumetric Changes in the Upper Airway After Bimaxillary Surgery for Skeletal Class III Malocclusions: a Case Series Study Using 3-dimensional Cone-beam Computed Tomography. J Oral Maxillofac Surg. 2012;70(12):2867-75. PubMed PMID: 22682739.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Volumetric changes in the upper airway after bimaxillary surgery for skeletal class III malocclusions: a case series study using 3-dimensional cone-beam computed tomography. AU - Lee,Yoonjung, AU - Chun,Youn-Sic, AU - Kang,Nara, AU - Kim,Minji, Y1 - 2012/06/08/ PY - 2011/10/24/received PY - 2012/03/02/revised PY - 2012/03/05/accepted PY - 2012/6/12/entrez PY - 2012/6/12/pubmed PY - 2013/2/12/medline SP - 2867 EP - 75 JF - Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons JO - J Oral Maxillofac Surg VL - 70 IS - 12 N2 - PURPOSE: Postsurgical changes of the airway have become a great point of interest and often have been reported to be a predisposing factor for obstructive sleep apnea after mandibular setback surgery. The purpose of this study was to evaluate the 3-dimensional volumetric changes in the upper airway space of patients who underwent bimaxillary surgery to correct Class III malocclusions. MATERIALS AND METHODS: This study was performed retrospectively in a group of patients who underwent bimaxillary surgery for Class III malocclusion and had full cone-beam computed tomographic (CBCT) images taken before surgery and 1 day, 3 months, and 6 months after surgery. The upper and lower parts of the airway volume and the diameters of the airway were measured from 2 different levels. Presurgical measurements and the amount of surgical correction were evaluated for their effect on airway volume. Data analyses were performed by analysis of variance and multiple stepwise regression analysis. RESULTS: The subjects included 21 patients (6 men and 15 women; mean age, 22.7 yrs). The surgeries were Le Fort I impaction (5.27 ± 2.58 mm impaction from the posterior nasal spine) and mandibular setback surgery (9.20 ± 4.60 mm set back from the pogonion). No statistically significant differences were found in the total airway volume for all time points. In contrast, the volume of the upper part showed an increase (12.35%) and the lower part showed a decrease (14.07%), with a statistically significant difference 6 months after surgery (P < .05). Predictor variables affecting the upper and lower parts of the airway volume were presurgical A point to Nasion-perpendicular (A to N-perp) and vertical surgical correction of the pogonion and the posterior nasal spine (P < .05). CONCLUSIONS: Bimaxillary surgery for the correction of Class III malocclusion affected the morphology by increasing the upper part and decreasing the lower part of the airway, but not the total volume. SN - 1531-5053 UR - https://www.unboundmedicine.com/medline/citation/22682739/Volumetric_changes_in_the_upper_airway_after_bimaxillary_surgery_for_skeletal_class_III_malocclusions:_a_case_series_study_using_3_dimensional_cone_beam_computed_tomography_ DB - PRIME DP - Unbound Medicine ER -