Head movements in the occlusal phase of mastication.
Head movements in the occlusal phase of mastication.
复制标题
咀嚼咬合阶段的头部运动。
DOI：
10.11480/jmds.490105
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发表时间：
2002
影响因子：
--
通讯作者：
K. Soma
中科院分区：
文献类型：
--
作者：
N. Matsubara;M. Hisano;S. Minakuchi;K. Soma
人们已经认识到，下颌运动引起头部运动，在下巴轻敲。然而，只有少数研究调查了咀嚼过程中头部运动的各个方面。本研究的目的是证明这一假设，即头部移动积极咀嚼，以实现有效的破坏食物团。用三维运动捕捉系统记录了9名成年志愿者咀嚼口香糖、橡皮糖和海带时头部和下颌运动的时间序列数据，并对运动的垂直分量进行了分析。为了关注咀嚼的咬合阶段，已经检查了以下参数：咬合阶段开始时头部运动的时滞，咬合阶段开始时头部的垂直速度，以及咬合阶段期间头部的平均速度。结果表明：咀嚼时，头向下移动，咀嚼口香糖、橡皮糖和海带时头的移动速度依次增大;有一种可能性，即食物团的弹性影响头部运动的活动，并且增加动能以实现食物团的有效破坏。
It has been recognized that mandibular movements evoke head movements during jaw tapping. However there have been only a few studies that investigated the aspects of head movements during mastication. The objective of this study was to demonstrate the hypothesis that the head moves actively in mastication in order to achieve effective destruction of a food bolus. Head and mandibular movements during gum, gummi candies and kelp chewing among nine adult volunteers have been recorded as time series data with a three-dimensional motion capture system and the vertical components of the movements have been analyzed. To focus on occlusal phase of mastication, the following parameters have been examined: time lag of the head movements at the beginning of occlusal phase, perpendicular velocity of the head at the beginning of the phase of occlusion, and average velocity of the head during occlusal phase. The results showed that the head moved downward in mastication and the velocity of the head movements increased in the order of gum, gummi candies and kelp chewing. There is a possibility that the elasticity of a food bolus affects the activity of head movements, and the kinetic energy was increased to achieve effective destruction of a food bolus.