Effects of rapid maxillary expansion on upper airway parameters in OSA children with maxillary restriction: A CBCT study

Background Rapid maxillary expansion (RME) has been proposed as an effective treatment for pediatric obstructive sleep apnea (OSA) and maxillary restriction in children. This study aimed to evaluate the effect of RME appliances on the nasomaxillary complex dimensions in children with OSA and maxillary constriction. Methods This prospective longitudinal study included 34 children aged 8–12 years with maxillary restriction and OSA confirmed by polysomnography who had completed RME therapy. The nasomaxillary complex is segmented into the nasal cavity, maxillary sinuses, and nasopharynx. The effect of RME on nasomaxillary complex dimensions was assessed pre and posttreatment using cone‐beam computed tomography, analysis, while a second standard overnight polysomnography (PSG) was performed to assess changes in respiratory parameters. Results Significant improvements were observed, including inferior maxillary dislocation (S‐S1 distance and N‐ANS), increased anterior and posterior facial height, and a 5.43 events/h reduction in Apnea‐Hypopnea Index (p