Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Hospital das Clínicas, Ribeirão Preto, SP, Brazil.
Universidade de São Paulo, Faculdade de Odontologia de Ribeirão Preto, Ribeirão Preto, SP, Brazil.
Braz J Otorhinolaryngol. 2023 Sep-Oct;89(5):101304. doi: 10.1016/j.bjorl.2023.101304. Epub 2023 Aug 19.
Investigate the influence of posterior crossbite on masticatory and swallowing functions by videofluoroscopy examination and to analyze the effects of Rapid Maxillary Expansion (RME) on the same functions.
A prospective longitudinal study was conducted on 32 children, 21 of them with posterior crossbite (10 girls and 11 boys, mean age 9.2 years, study group) and 11 children with no occlusal changes (6 girls and 5 boys, mean age 9.3 years, control group). The children were evaluated by an orthodontist for diagnosis, group characterization and occlusal treatment, by the otorhinolaryngology team for the assessment of respiratory symptoms, and by a speech therapist for videofluoroscopic evaluation of masticatory and swallowing parameters. The children with posterior crossbite were treated orthodontic ally using the Haas disjunctor for approximately six months and re-evaluated 5-months after removal of the appliance. Data were analyzed statistically by the Studentt-test for independent samples for comparison of the crossbite and control groups before and after treatment.
There was no significant difference in oral preparatory and oral transit times, nor in cycles and masticatory frequency, between the pre and post orthodontic treatment groups and the control group.
Rapid maxillary expansion did not influence the masticatory and swallowing variables studied by videofluoroscopy. However, the data require caution in interpretation.
通过视频透视检查研究后牙反（牙合）对咀嚼和吞咽功能的影响，并分析快速扩弓（RME）对这些功能的影响。
对 32 名儿童进行前瞻性纵向研究，其中 21 名有后牙反（牙合）（10 名女孩和 11 名男孩，平均年龄 9.2 岁，研究组），11 名无咬合变化的儿童（6 名女孩和 5 名男孩，平均年龄 9.3 岁，对照组）。由正畸医生进行诊断、组特征描述和咬合治疗，由耳鼻喉科团队评估呼吸症状，由言语治疗师进行视频透视评估咀嚼和吞咽参数。对于后牙反（牙合），使用 Haas 分牙器进行正畸治疗，大约 6 个月，在去除矫治器后 5 个月进行重新评估。采用独立样本 Studentt 检验对治疗前后的反（牙合）组和对照组进行数据比较。
在正畸治疗前后，口腔预备期和口腔传递时间、周期和咀嚼频率在反（牙合）组和对照组之间均无显著差异。
快速扩弓未影响视频透视研究的咀嚼和吞咽变量。然而，数据的解释需要谨慎。
