Langer Marjorie Regina Eguren, Itikawa Carla Enoki, Valera Fabiana Cardoso Pereira, Matsumoto Mírian Aiko Nakane, Anselmo-Lima Wilma Terezinha
Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
Int J Pediatr Otorhinolaryngol. 2011 Jan;75(1):122-5. doi: 10.1016/j.ijporl.2010.10.023. Epub 2010 Nov 18.
To evaluate the effect of rapid maxillary expansion (RME) on the dimension of the nasopharyngeal space and its relation to nasal airway resistance.
Twenty-five school-age children (from 7 to 10 year-old) with mouth and/or mixed breathing, with mixed dentition and uni- or bilateral posterior crossbite involving the deciduous canines and the first permanent molars, were evaluated. RME was placed and remained during 90 days. Rhinomanometry and orthodontic documentation were performed at four different times, i.e., before (T(1)), immediately after (T(2)), 90 days (T(3)) and 30 months (T(4)) after RME.
Differences in nasopharyngeal area and in nasal airway resistance were observed only 30 months after RME, and could be explained by facial growth, and not because of the orthodontic procedure.
RME does not influence on nasopharyngeal area or nasal airway resistance in long-term evaluation.
评估快速上颌扩弓（RME）对鼻咽腔尺寸的影响及其与鼻气道阻力的关系。
对25名患有口呼吸和/或混合性呼吸的学龄儿童（7至10岁）进行评估，这些儿童处于混合牙列期，存在单侧或双侧后牙反合，累及乳牙尖牙和第一恒磨牙。放置RME并持续90天。在四个不同时间点进行鼻阻力测量和正畸记录，即RME前（T(1)）、RME后即刻（T(2)）、RME后90天（T(3)）和30个月（T(4)）。
仅在RME后30个月观察到鼻咽腔面积和鼻气道阻力的差异，这可以用面部生长来解释，而非正畸治疗程序所致。
在长期评估中，RME对鼻咽腔面积或鼻气道阻力无影响。
