Hong-Soon Kim1, Gyu-Tae Kim2, Sun Kim3, Jung-Woo Lee1, Eun-Cheol Kim4, Yong-Dae Kwon5. 1. Department of Oral and Maxillofacial Surgery, Kyung Hee University School of Dentistry, Kyungheedaero 23, Seoul, 130-872, South Korea. 2. Department of Oral and Maxillofacial Radiology, Kyung Hee University School of Dentistry, Seoul, South Korea. 3. Kyung Hee University Dental Hospital, Seoul, South Korea. 4. Deptartment of Oral and Maxillofacial Pathology and Research Center for Tooth and Periodontal Regeneration (MRC), Kyung Hee University School of Dentistry, Seoul, South Korea. eckim@khu.ac.kr. 5. Department of Oral and Maxillofacial Surgery, Kyung Hee University School of Dentistry, Kyungheedaero 23, Seoul, 130-872, South Korea. yongdae.kwon@gmail.com.
Abstract
OBJECTIVE: The study aims to evaluate the pharyngeal airway space (PAS) following bimaxillary surgery in skeletal class III patients and to compare the changes in PAS between genders using cone-beam computed tomography (CBCT). MATERIALS AND METHODS: In all, 38 patients (16 male and 22 female) with skeletal class III malocclusion underwent bimaxillary surgery. CBCT scans were acquired approximately 1 month before surgery, 3 months after surgery, and 6 months after surgery. The oropharyngeal volume and the minimum cross-sectional area (CSA) were characterized using the InVivoDental imaging software package at each time point. RESULTS: The volume and minimum CSA decreased significantly postoperatively, which was maintained until 6 months postoperatively (p < 0.01). The location of the minimum CSA tended to move into the retropalatal and retroglossal areas postoperatively. A strong correlation between volume and minimum CSA was found. The amount of mandibular setback was not correlated with the change in the airway. By gender, significant decreases in both the volume and minimum CSA were found in females (p < 0.05) but not in males. CONCLUSION: Bimaxillary surgery significantly affects PAS. Gender differences should also be considered when considering changes in PAS. CLINICAL RELEVANCE: An awareness of the effects of bimaxillary setback surgery on the airway should be considered when implementing an orthognathic treatment plan.
OBJECTIVE: The study aims to evaluate the pharyngeal airway space (PAS) following bimaxillary surgery in skeletal class III patients and to compare the changes in PAS between genders using cone-beam computed tomography (CBCT). MATERIALS AND METHODS: In all, 38 patients (16 male and 22 female) with skeletal class III malocclusion underwent bimaxillary surgery. CBCT scans were acquired approximately 1 month before surgery, 3 months after surgery, and 6 months after surgery. The oropharyngeal volume and the minimum cross-sectional area (CSA) were characterized using the InVivoDental imaging software package at each time point. RESULTS: The volume and minimum CSA decreased significantly postoperatively, which was maintained until 6 months postoperatively (p < 0.01). The location of the minimum CSA tended to move into the retropalatal and retroglossal areas postoperatively. A strong correlation between volume and minimum CSA was found. The amount of mandibular setback was not correlated with the change in the airway. By gender, significant decreases in both the volume and minimum CSA were found in females (p < 0.05) but not in males. CONCLUSION: Bimaxillary surgery significantly affects PAS. Gender differences should also be considered when considering changes in PAS. CLINICAL RELEVANCE: An awareness of the effects of bimaxillary setback surgery on the airway should be considered when implementing an orthognathic treatment plan.
Authors: Alexander Juerchott; Christian Freudlsperger; Dorothea Weber; Johann M E Jende; Muhammad Abdullah Saleem; Sebastian Zingler; Christopher J Lux; Martin Bendszus; Sabine Heiland; Tim Hilgenfeld Journal: Eur Radiol Date: 2019-12-04 Impact factor: 5.315