Measurement of dynamic bite force during mastication
Measurement of dynamic bite force during mastication
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DOI：
10.1111/j.1365-2842.2011.02278.x
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发表时间：
2012-05-01
影响因子：
2.9
通讯作者：
Svensson, P.
中科院分区：
文献类型：
--
作者：
Shimada, A.;Yamabe, Y.;Svensson, P.
不同类型和大小的食物的有效咀嚼取决于来自机械感受器的感觉信息和下颌运动的中枢控制机制以及施加的咬合力的快速整合。咀嚼的神经基础已经研究了几十年，但在理解咬合力的动态方面进展甚微，主要是由于咬合力记录仪的技术限制。本研究的目的是开发一种新的口内咬合力记录仪，这将允许在不增加咬合垂直尺寸的情况下研究自然咀嚼，并随后分析在咀嚼五种不同类型的食物时，下颌闭合肌肉的肌电图（EMG）活动、下颌运动和咬合力之间的关系。定制的力记录仪的应变传感器的基础上安装到上，下磨牙的首选咀嚼侧在14个健康和有齿的科目（2139年），并进行了记录，在自愿咀嚼五种不同的食物。口内力记录连续获得所有科目。单因素方差分析显示，食物对咬合力冲量和综合肌电有显著影响（P < 0.05），咀嚼周期对时间相关参数有显著影响（P < 0.001）。这项研究表明，口内力记录是可行的，可以提供新的信息，人类咀嚼的动力学与口腔康复的直接影响。我们还建议，控制咬合力在咀嚼是通过预期的调整和编码的丸特性。
Efficient mastication of different types and size of food depends on fast integration of sensory information from mechanoreceptors and central control mechanisms of jaw movements and applied bite force. The neural basis underlying mastication has been studied for decades but little progress in understanding the dynamics of bite force has been made mainly due to technical limitations of bite force recorders. The aims of this study were to develop a new intraoral bite force recorder which would allow the study of natural mastication without an increase in the occlusal vertical dimension and subsequently to analyze the relation between electromyographic (EMG) activity of jaw-closing muscles, jaw movements and bite force during mastication of five different types of food. Customized force recorders based on strain gauge sensors were fitted to the upper and lower molar teeth on the preferred chewing side in fourteen healthy and dentate subjects (2139 years), and recordings were carried out during voluntary mastication of five different kinds of food. Intraoral force recordings were successively obtained from all subjects. anova showed that impulse of bite force as well as integrated EMG was significantly influenced by food (P < 0.05), while time-related parameters were significantly affected by chewing cycles (P < 0.001). This study demonstrates that intraoral force recordings are feasible and can provide new information on the dynamics of human mastication with direct implications for oral rehabilitation. We also propose that the control of bite force during mastication is achieved by anticipatory adjustment and encoding of bolus characteristics.