Abstract
BackgroundBimaxillary orthognathic surgery with maxillomandibular setback is often accompanied by changes in airway space. We analyzed the changes in airway space before and after surgery and assessed their association with obstructive sleep apnea.MethodsThis study is based on the cohort of 13 adult patients (9 males, 4 females, average age 23.85 years) who underwent bimaxillary orthognathic surgery with maxillomandibular setback.We performed computed tomography and portable polysomnography before and after the surgery to assess changes in airway space and Apnea-Hypopnea Index (AHI) values (total, supine, non-supine).ResultsThe oropharyngeal airway volume decreased by 29% after the surgery, which was statistically significant (p < .05). The upper airway volume and hypopharyngeal airway volume were decreased, but not significantly (4 and 19%, respectively). The changes in airway surface area were statistically significant at all levels examined (p < .05). Changes in the maximum anteroposterior width of the airway were also significant at all levels (p < .05). However, the changes in maximum lateral width were only statistically significant at C2 level (p < .05). AHI values were increased after the surgery but not significantly at any position.ConclusionsAlthough bimaxillary surgery with maxillomandibular setback significantly reduces the airway space, it does not affect AHI values or induce obstructive sleep apnea.
Highlights
Bimaxillary orthognathic surgery with maxillomandibular setback is often accompanied by changes in airway space
The purpose of this study was to assess the association between changes in the airway space after the surgery and subsequent obstructive sleep apnea (OSA) in patients who underwent bimaxillary orthognathic surgery with maxillomandibular setback
Subjects This study was based on 13 adult (≥ 18 years old) patients diagnosed with class III malocclusion and mandibular prognathism and treated with bimaxillary orthognathic surgery with maxillomandibular setback at the Department of Oral-Maxillofacial Surgery at Samsung Medical Center, between July 2016 and October 2017
Summary
Bimaxillary orthognathic surgery with maxillomandibular setback is often accompanied by changes in airway space. We analyzed the changes in airway space before and after surgery and assessed their association with obstructive sleep apnea. In addition to its positive effects for treatment of malocclusion, it changes the anatomical locations of the soft tissues, including the muscles around the jaw and tongue base; previous studies have reported that mandibular setback surgery results in anteroposterior narrowing of the. The purpose of this study was to assess the association between changes in the airway space after the surgery and subsequent OSA in patients who underwent bimaxillary orthognathic surgery with maxillomandibular setback. We measured AHI values before and post-surgery through polysomnography, to assess the relationship between the changes in airway space and AHI values
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