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小兒磨牙
幼兒期

        小孩磨牙是由于咀嚼肌的持續收縮引起的,而咀嚼肌的運動又是受三叉神經支配的,所以,凡是能影響到三叉神經和咀嚼肌的因素,都可以引起睡覺磨牙。磨牙是一 種咬合障礙,這種咬合障礙破壞了咀嚼器官的協調關系,于是機體就以增加牙齒的磨動來去除咬合障礙,結果就會不由自主地磨牙。磨牙    (共 1854 字)     [閱讀本文] >>

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