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http://dx.doi.org/10.4041/kjod.2010.40.3.145

Three dimensional cone-beam CT study of upper airway change after mandibular setback surgery for skeletal Class III malocclusion patients  

Kim, Na-Ri (Department of Orthodontics, School of Dentistry, Pusan National University)
Kim, Yong-Il (Department of Orthodontics, School of Dentistry, Pusan National University)
Park, Soo-Byung (Department of Orthodontics, School of Dentistry, Pusan National University)
Hwang, Dae-Seok (Department of Oral & Maxillofacial Surgery, School of Dentistry, Pusan National University)
Publication Information
The korean journal of orthodontics / v.40, no.3, 2010 , pp. 145-155 More about this Journal
Abstract
Objective: Lateral cephalometric radiographs have been the main form of resource for assessing two dimensional anteroposterior airway changes. The purpose of this study was to evaluate the three dimensional volumetric change in the upper airway space in Class III malocclusion patients who underwent mandibular setback surgery. Methods: Three dimensional cone-beam computed tomographs (CBCT) and their three dimensional reconstruction images were analyzed. The samples consisted of 20 adult patients (12 males and 8 females) who were diagnosed as skeletal Class III and underwent mandibular setback surgery. CBCTs were taken at 3 stages - Baseline (1.8 weeks before surgery), T1 (2.3 months after surgery), and T2 (1 year after surgery). Pharyngeal airway was separated according to the reference planes and reconstructed into the nasopharynx, the oropharynx and the hypopharynx. Measurements at Baseline, T1, and T2 were compared between groups. Results: The result showed the volume of the pharyngeal airway decreased significantly 2.3 months after surgery (p < 0.001) and the diminished airway did not recover after 1 year post-surgery. The oropharynx was the most decreased area. Conclusions: These findings suggest that mandibular setback surgery causes both short-term and long-term decrease in the upper airway space.
Keywords
Cone-beam computed tomography; Orthognathic surgery; Pharyngeal airway;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By Web Of Science : 2  (Related Records In Web of Science)
Times Cited By SCOPUS : 1
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