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    Efeitos da expansão rápida da maxila nas estruturas do terço médio e inferior da face em crianças respiradoras bucais
    (Universidade Federal de São Paulo (UNIFESP), 2021) Marra, Artur Rodrigues [UNIFESP]; Cappellette Junior, Mario [UNIFESP]; Universidade Federal de São Paulo
    Introduction: Transverse maxillary atresia should be corrected as early as possible in the growth phase, with resources that provide skeletal changes, and one of the procedures widely addressed in the literature is rapid maxillary expansion (RME). Objective: Evaluate, in short term, the dentoskeletal effects of RME on maxillary and nasal dimensions using computed tomography images ( pre and post-RME at 6 months). Methods: Frontal norm computed tomography (CT) images of 30 patients ranging from 7 to 10 years old, mean age of 8.7 years, 18 males and 12 females, mouth breathers, who underwent RME. Linear measurements Pre (T1) and Post (T2) RME were performed, and all measurements were repeated by the same observer (intraobserver error) and by a second observer (interobserver error). Results: Comparing the results of the seven measures evaluated before RME (T1) and after RME (T2), there were significant differences, between T1 and T2, in the measures facial width, nasal height, nasal width, maxillary width, maxillary height and in the upper intermolar distance. Regarding the lower intermolar distance, there were no significant differences between T1 and T2. Facial width registered the strongest variation in the values of linear measurements between T1 and T2. Conclusion: After comparative analysis of the results obtained pre and post RME, we can conclude that the effects of rapid maxillary expansion, in short term, show a significant increase in facial width, nasal height, nasal width, maxillary width, maxillary height and upper intermolar distance.