| Summary: | 碩士 === 臺北醫學大學 === 口腔復健醫學研究所 === 91 === The application of transpalatal arch (TPA) is quite common in orthodontic treatment. However, patients often feel discomfort after application of TPA. Therefore, the purpose of this study was to investigate the influence of TPA on tongue movement during swallowing as well as the adaptation ability of tongue on TPA. 15 healthy adults without any known swallowing disorder were selected in this study. There are two different TPAs (2mm and 4mm) to wear and the wearing time is 7 days for each one. The volunteers were examined by the B+M mode ultrasonography for the subjective tongue movement during swallowing and by the visual analogue scales (VAS) for the objective self-evaluation (dysphagia, toothache, pain of tongue). The relationships between the objective VAS value and the subjective ultrasonographic measurement of swallowing movement were examined by Spearman’s correlation analysis. The differences between the original condition and ongoing conditions after TPA application were examined by Wilcoxon sign ranked test.
There are correlations between the objective VAS value and the subjective ultrasonographic measurement of swallowing movement. The changes of rest position are positively correlated to the changes of magnitude of early final phase. The degrees of dysphagia are positively correlated to the changes of duration of late final phase and total swallowing. The degrees of pain of tongue are positively correlated to the degrees of toothache. The application of TPA resulted in an downward movement of the rest position, a prolonged duration in late transport phase (p<0.05) and recovered in 7th day, an increased magnitude of early final phase, a prolonged duration of late final phase and the longer prolongation induced by the higher TPA, a prolonged duration of total swallowing. Besides the rest position of tongue, all swallowing ultrasonographic measurements were recovered immediately after removal of TPA. The rest position was recovered in 7 days after removal of 2mm TPA and recovered in 1 day after removal of 4mm TPA. Indeed, the swallowing movement of tongue was interfered after application of TPA, but the tongue owned the ability of adaptation to TPA in 7 days. The swallowing movement will recover immediately after removal of TPA.
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