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颞下颌关节紊乱(TMD)

ID: ANH17193chis
医学动画文字记录:颞下颌关节紊乱是下颌关节和咀嚼肌的问题。颞下颌关节(TMJ)是下颌与颅骨的连接处。人体有两个颞下颌关节,分别在每只耳朵的前面。每个关节都连接着下颌骨和颅骨的颞骨。骨与骨之间有一个叫做椎间盘的软垫。当张开嘴时,下颌骨的圆形末端和齿盘向前滑动。当闭上嘴时,它们会滑回原位。肌肉附着在下颌骨上,控制下颌骨的运动。关节可以像铰链一样开合。但与其他关节不同的是,颞下颌关节也可以前后滑动,左右滑动。由于这种滑动能力,张开和闭上嘴巴时,关节需要下颌肌肉和牙齿帮助引导到适当的位置。在其中一种颞下颌关节紊乱类型中,椎间盘可能会移位。在第二种情况下,关节可能会因疾病问题而受损,比如关节炎,或者关节发炎并损伤。第三种情况是,下颌肌肉会有疼痛的痉挛。其他健康问题,比如晚上磨牙,也会导致关节出现症状。颞下颌关节紊乱最常见的症状是关节和附近肌肉的疼痛。有时,颞下颌关节疼痛会被误认为是耳朵疼痛,因为耳朵离关节太近了。头痛可能是由下颌和颞部周围肌肉的疼痛引起的。其他症状包括:下颌活动障碍,张嘴或闭口时发出咔哒声的疼痛,以及牙齿咬合方式的改变。如果你对颞下颌关节紊乱有疑问,请咨询医生。

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