Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical & Health Sciences, Hiroshima, Japan.
Division of Oral Health Sciences, Department of Anatomy and Functional Restorations, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan.
PLoS One. 2021 May 19;16(5):e0251759. doi: 10.1371/journal.pone.0251759. eCollection 2021.
This study aimed to evaluate improvement of tongue-palatal contact patterns during swallowing after orthognathic surgery in mandibular prognathism patients. Thirty patients with mandibular prognathism treated by orthognathic surgery (average age of 27 years, 3 months) and 10 controls (average age 29 years, 6 months) participated in this study. Tongue-palatal contact patterns of patients before and three months after surgery were evaluated by electropalatography (EPG) as well as controls. Whole total of tongue-palatal contact at 0.3, 0.2, and 0.1 sec before complete tongue-palatal contact during swallowing were evaluated. The duration of swallowing phases was also examined. Complete contact of tongue-tip in the alveolar part of individual artificial EPG plate were shown at 0.3, 0.2, and 0.1 sec before complete tongue-palatal contact in the controls, although incomplete contact in the alveolar part were shown at 0.3 sec in mandibular prognathism patients. Whole total of tongue-palatal contact at 0.3 and 0.2 sec before complete tongue-palatal contact was significantly lower in the patients before surgery than in the controls (p<0.05). However, these values increased after surgery. The duration of oral and pharyngeal phase was significantly longer in the patients before surgery than in the controls and the patients after surgery (p<0.01). This study demonstrated that the tongue-palatal contact pattern improved and the duration of oral and pharyngeal phase was shortened in mandibular prognathism patients during swallowing after orthognathic surgery. It is suggested that changes in maxillofacial morphology by orthognathic surgery can induce normal tongue movement during swallowing. (The data underlying this study have been uploaded to figshare and are accessible using the following DOI: https://doi.org/10.6084/m9.figshare.14101616.v1).
本研究旨在评估正颌手术后下颌前突患者吞咽时舌腭接触模式的改善。 30 名接受正颌手术（平均年龄 27 岁 3 个月）的下颌前突患者和 10 名对照组（平均年龄 29 岁 6 个月）参加了这项研究。通过电腭图（EPG）评估患者手术前后 3 个月的舌腭接触模式以及对照组。评估了吞咽过程中完全舌腭接触前 0.3、0.2 和 0.1 秒的整个舌腭总接触。还检查了吞咽阶段的持续时间。在对照组中，在完全舌腭接触前 0.3、0.2 和 0.1 秒，个别人工 EPG 板的牙槽部分可见舌尖完全接触，但在下颌前突患者中，牙槽部分在 0.3 秒显示不完全接触。在手术前的患者中，完全舌腭接触前 0.3 和 0.2 秒的整个舌腭总接触明显低于对照组（p<0.05）。然而，这些值在手术后增加。手术前患者的口腔和咽期持续时间明显长于对照组和手术后患者（p<0.01）。本研究表明，正颌手术后下颌前突患者吞咽时舌腭接触模式改善，口腔和咽期持续时间缩短。提示正颌手术改变颌面形态可诱导吞咽时正常的舌运动。（本研究的基础数据已上传到 figshare，并可通过以下 DOI 访问：https://doi.org/10.6084/m9.figshare.14101616.v1）。
