Abstract
ABSTRACT Objective: To three-dimensionally evaluate the upper airway of individuals with cleft lip and palate (CLP) and Class III malocclusion and the occurrence of obstructive sleep apnea (OSA). Methods: Twenty-one CLP individuals with Class III malocclusion, 20–29 years of age, who underwent computed tomography for orthognathic surgery planning, were prospectively evaluated. All participants underwent polysomnography, and the apnea-hypopnea index ≥ 5 events/hour was considered indicative of OSA. The total upper airway and its subdivisions volumes, as well as the minimum pharyngeal cross-sectional area (CSA), were assessed using Mimics software. Results: Among the 21 individuals analyzed, 6 (29%) presented with OSA. The total upper airway and the oropharynx mean volumes were significantly decreased in subjects with OSA when compared to individuals without OSA. Mean CSA was not statistically different between groups. Conclusion: CLP individuals with Class III malocclusion and OSA have an upper airway significantly smaller than individuals without OSA.
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