Effects of noxious stimulous upon interaction between autonomic nervous system and oral function.

目的：探讨颞下颌关节（TMJ）负荷与颞下颌关节（TMJ）不对称性的关系，方法：采用6DOF运动捕捉系统，对10名正常女性受试者的咬合力、咬合面积和下颌运动进行同步记录，并对测量结果进行统计学分析。在每一个主题，口香糖咀嚼与/不插入人工咬合干扰在磨牙咬合面上的习惯chewingside.Results：插入咬合干扰增加了下颌骨旋转速度的前后轴（滚角）。结论：咬合平衡接触的相互作用可能导致颞下颌关节紊乱。

Aim :The aim of the study was to investigate biomechanical relationship between asymmetry of human temporom andibular joint/occclusal scheme and the TMJ loading.Subjects :Ten female subjects with acceptable good occlusion participated in this study.Methods :By means of the 6DOF motion capture system, occlusal force, occlusal area and the 6DOF mandibular motion were simultaneously recorded. In each subject, gum-chewing was performed with/without insertion of artificial occlusal interference at the molar occlusal surface on the habitual chewing side.Results :The insertion of the occlusal interference increased the velocity of mandibular rotation around the antero-posterior axis (Roll angle). In addition, the interference increased the variation of the movement of the condylar surface along the meiolateral direction.Conclusions :The results suggested that the interaption of the occlusal balancing contact may cause the derangement of the TMJ.