Discipline of Otorhinolaryngology, School of Medical Sciences, State University of Campinas, Rua Maria Monteiro 841, Campinas, São Paulo, Brazil.
Eur J Orthod. 2012 Feb;34(1):83-7. doi: 10.1093/ejo/cjq167. Epub 2010 Dec 27.
The persistence of childlike deglutition after the replacement of deciduous teeth is described as atypical deglutition. This condition has been attributed to sucking action without nutritive purposes, use of a feeding bottle, oral respiration, and anatomical abnormalities. Among the possible anatomical alterations, the hyoid bone, as a result of being the origin or the insertion of several muscles involved in swallowing, may have its position altered in cases of atypical deglutition. The aim of the present study was to evaluate the position of the hyoid bone using lateral teleradiographs, among patients with atypical deglutition during the stage of mixed dentition. Using cephalometric analysis on lateral teleradiographs, the distances of H-MP (hyoid to mandibular plane) and H-T (hyoid to tuber) were measured in two groups: the experimental group with atypical deglutition and the control group normal deglutition. Both groups included subjects in mixed dentition stage. Measurements from the groups were compared using Mann-Whitney U-test and a P-value <0.05 was considered as an indication of statistical significance. The average distance of the H-MP variable was 11.69 mm for the control group and 16.14 mm for the experimental group, with a statistically significant difference (P = 0.016). The average distance of the H-T variable was 2.26 mm for the control group and -5.89 mm for the experimental group, with significant difference (P < 0.001). There was no correlation among the variables studied. Cephalometric analysis of the H-MP distance revealed a mean difference of approximately 5 mm between the two groups, and the difference was more than 7 mm for H-T distance. Distances of H-MP and H-T based on radiographic measurements were greater in individuals with atypical deglutition than in control group and there was no correlation between these two parameters.
在恒牙替换后仍存在幼儿式吞咽动作被描述为非典型吞咽。这种情况可能与无营养目的的吸吮动作、使用奶瓶、口腔呼吸和解剖异常有关。在可能的解剖结构改变中，舌骨作为参与吞咽的几块肌肉的起点或附着点，其位置在非典型吞咽中可能会发生改变。本研究旨在通过侧位头颅侧位片评估混合牙列期非典型吞咽患者舌骨的位置。通过对侧位头颅侧位片进行头影测量分析，在非典型吞咽实验组和正常吞咽对照组中分别测量 H-MP（舌骨至下颌平面）和 H-T（舌骨至颏结节）的距离。两组均包括混合牙列期的受试者。使用 Mann-Whitney U 检验比较两组的测量值，P 值<0.05 被认为具有统计学意义。对照组 H-MP 变量的平均值为 11.69mm，实验组为 16.14mm，差异具有统计学意义（P=0.016）。对照组 H-T 变量的平均值为 2.26mm，实验组为-5.89mm，差异具有统计学意义（P<0.001）。研究中的变量之间无相关性。H-MP 距离的头影测量分析显示，两组之间的平均差异约为 5mm，而 H-T 距离的差异超过 7mm。非典型吞咽患者的 H-MP 和 H-T 基于放射测量的距离大于对照组，且这两个参数之间无相关性。
