Effect of occlusal vertical dimension on swallowing patterns and perioral electromyographic activity.
Effect of occlusal vertical dimension on swallowing patterns and perioral electromyographic activity.
复制标题
咬合垂直尺寸对吞咽模式和口周肌电活动的影响。
DOI：
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发表时间：
2016
影响因子：
2.9
通讯作者：
M. Farella
中科院分区：
文献类型：
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作者：
S. MacAvoy;H. Jack;J. Kieser;M. Farella
异常的吞咽模式与特定的牙面特征有关，例如前牙开咬，但吞咽和咬合不正之间的因果关系仍然存在很大争议。本研究的目的是确定咬合垂直距离（OVD）的急性变化对口内压力吞咽模式和吞咽过程中口周肌电图（EMG）的影响。10名志愿者（5名女性，5名男性; 27 - 32岁）重复标准化吞咽任务，使用不同高度的下颌托盘逐渐增加OVD。在每个托盘就位的情况下重复执行标准化吞咽任务。对个体吞咽波形进行定量和定性分析。评估每次吞咽的峰值压力、吞咽持续时间、达到峰值压力的时间和唇部EMG峰值活动。使用混合模型分析数据。随着OVD的增加，吞咽过程中的唇峰压几乎增加了3倍（+2统计学1 kPa; P ≤ 0.001），而吞咽持续时间在唇水平增加了12.7%（+160 ms; P = 0.01），在舌水平增加了26.4%（+270 ms; P <0.001）。吞咽过程中口周肌肉活动增加了43.7%（P ≤ 0.01），直至OVD，此时无法达到静息唇密封。吞咽波形个体间差异显着，但个体间波形的影响很小。与OVD变化相关的适应性反应和波形相似性支持吞咽的中央控制机制的存在，其可以通过外围输入进行修改。
Abnormal swallow patterns have been associated with specific dentofacial traits, such as an anterior open bite, but the cause-effect relationship between swallowing and malocclusion remains highly controversial. The aim of this research was to determine the effects of acute change in occlusal vertical dimension (OVD) on intraoral pressure swallow patterns and perioral electromyographic activity (EMG) during swallowing. Ten volunteers (five female, five male; 27-32 years) repeated standardised swallowing tasks as the OVD was progressively increased using mandibular trays of different heights. Standardised swallowing tasks were performed repetitively with each tray in place. Individual swallowing waveforms were quantitatively and qualitatively analysed. Peak pressure, swallow duration, time to peak pressure and lip EMG peak activity were assessed for each swallow. Data were analysed using mixed-model analysis. As OVD increased, lip peak pressure during swallowing increased almost threefold (+2·1 kPa; P ≤ 0·001), whereas swallow duration increased by 12·7 per cent (+160 ms; P = 0·01) at lip level and by 26·4 per cent (+270 ms; P < 0·001) at tongue level. Perioral muscle activity during swallows increased by 43·7 per cent (P ≤ 0·01) up to the OVD where resting lip seal was not attainable. Swallowing waveforms varied markedly between individuals, but interindividual waveforms were only minimally affected. The adaptive response and the waveform similarities associated with OVD variation supports the existence of a central control mechanism for swallowing, which may be modified by peripheral inputs.