{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,16]],"date-time":"2025-12-16T12:45:16Z","timestamp":1765889116381,"version":"3.40.5"},"reference-count":35,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2023,6,7]],"date-time":"2023-06-07T00:00:00Z","timestamp":1686096000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Orthod Craniofacial Res"],"published-print":{"date-parts":[[2024,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To evaluate the effects of rapid maxillary expansion (RME) on Sleep Disturbance Scale for Children (SDSC) with maxillary atresia.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>The sample consisted of 27 paediatric patients evaluated through a Brazilian version of the SDSC, answered by their guardians at the following experimental time points: T0 (before installing the Hyrax expander), T1 (on the day of expander stabilization), T2 (3\u2009months after expander stabilization), T3 (immediately after expander removal, following 6\u2009months of retention), and T4 (3\u2009months post\u2010retention). Multilevel Poisson analysis adjusted for repeated measures was performed to compare outcomes across the assessment time points.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The mean age of patients was 9.1\u2009years (SD\u2009=\u20091.46). The total SDSC scores decreased and were statistically significant from T2 onwards (<jats:italic>P<\/jats:italic>\u2009&lt;\u2009.01), with a decrease of 24% at T4 compared with T1 (IRR 0.76; 95% CI 0.69\u20130.84). The mean scores at T4 were already lower than the cutoff point for risk of sleep disorders. Regarding the specific domains, there was a significant reduction in sleep breathing disorders, sleep\u2013wake transition disorders, and disorders of excessive somnolence as of T2 (<jats:italic>P<\/jats:italic>\u2009&lt;\u2009.01), T3 (<jats:italic>P<\/jats:italic>\u2009&lt;\u2009.05) and T4 (<jats:italic>P<\/jats:italic>\u2009&lt;\u2009.05), respectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>RME in children with maxillary atresia had a positive effect on the reduction of total SDSC scores after 3\u2009months of expander stabilization, sustained over 6 and 9\u2009months and significant reduction in sleep breathing disorders domain, sleep\u2013wake transition disorders domain, and disorders of excessive somnolence domain over time 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