Navegando por Palavras-chave "Expansão Maxilar"

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    Alterações dentárias e esqueléticas em crianças respiradoras bucais submetidas à expansão rápida maxilar
    (Universidade Federal de São Paulo (UNIFESP), 2021) Campos, Luciano Nogueira De Almeida [UNIFESP]; Cappellette Junior, Mario [UNIFESP]; Universidade Federal de São Paulo
    Introduction: Maxillary transverse deficiency is one of the most common skeletal alterations in the craniofacial region with an etiology comprising genetic and/or functional factors such as mouth breathing. The rapid maxillary expansion (RME) procedure is effective to produce transverse skeletal correction by orthopedic movement of the maxillary bones. Simultaneously with the orthopedic effect, an orthodontic effect occurs by tooth movement. When performed before the peak of pubertal growth, it induces more pronounced skeletal changes and directs the growth and transverse development of the maxilla. Objectives: To evaluate by computed tomography, the effects of RME, in the short term, on skeletal and dental dimensions in mouth breathing patients and to compare the results obtained according to the age. Methods: Measurements in a sample consisting of 42 mouth breather patients, ages ranging from 7 to 13 years and skeletal maxillary deficiency. The sample was assessed according to age: 21 children aged 7 to 9 years and 21 children aged 10 to 13 years. All were submitted to computed tomography exams in 2 phases: T1- pre-RME and T2 - six months post-RME . The Dolphin® Imaging image manipulation program (Dolphin Imaging & Management Solutions, Chatsworth, California Version 11.7 Premium) was used for evaluation of transverse dental dimensions in the canine region (13-23) and first molars (16 -26), and transverse skeletal dimensions in the nasal cavity (Rhi-ENA) and facial width (ZR-ZL). Results: Both groups showed significant increases in all variables. Regarding alterations between T1 and T2, there were no significant differences between the groups (p> 0.05). Only significant differences were registered in the Rhi-ENA measure (p = 0.011): the variation was significantly higher in patients in the younger group (+ 6.4%, d = 1.76) than in the older one (+ 2.5%, d = 0.55). Conclusions: The orthopedic effects of ERM, in short term, was effective in both groups with the increase in linear measures of dentofacial height and width.
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    Avaliação do espaço aéreo anterior da cavidade nasal e qualidade de vida em crianças respiradores bucais submetidos à expansão rápida da maxila
    (Universidade Federal de São Paulo (UNIFESP), 2020-05-28) Nagai, Lucia Hatsue Yamamoto [UNIFESP]; Cappellette Junior, Mario [UNIFESP]; Universidade Federal de São Paulo
    Introduction: The anterior portion of the nasal cavity includes the critical region of maximal resistance to airflow that even small changes in its geometry can have a significant impact on nasal airflow. Objectives: to assess the effects of rapid maxillary expansion (RME) on the anterior skeletal and soft tissue structures of the nasal cavity in mouth-breathing children and correlated these findings with the patient’s quality of life. Methods: 35 mouth-breathing patients (mean age 10.7±2.0 years) submitted to RME were evaluated by means of computed tomography at preRME and 4-5 months thereafter. Subjective symptoms were assessed by using a validated quality of life questionnaire answered by patients and patients’ parents/legal guardians. Results: The total anterior nasal volume increased by 20.47% on average during the overall observation period. The skeletal and soft tissue volumes increased by 26.5% and 17.6% respectively, and a cross-sectional area increased by 19.96% on average. Different combinations of angles were found, however, more significant increases occurred when the angular value of one side was much smaller than opposite side. There was a statistically significant reduction in the mean scores of the quality of life scale, indicating a significant improvement in quality of life between T1 and T2. Conclusions: In the short term, RME promote a significant increase in the anterior nasal volume, with a higher proportion within the skeletal boundaries. This, associated with an increased minimum cross-sectional area, may have contributed to respiratory improvement. In addition, different combinations of nasal valve angles suggest that RME can influence the position of the septum.