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

目的：探讨颞下颌关节/咬合方案不对称与颞下颌关节负荷的生物力学关系。受试者：10名可接受良好咬合的女性受试者参加本研究。方法：采用6DOF运动捕捉系统，同时记录牙合力、牙合面积和下颌6DOF运动情况。在每个受试者中，在习惯咀嚼侧的磨牙咬合面插入或不插入人工咬合干扰进行口香糖咀嚼。结果：咬合干涉的插入增加了下颌绕前后轴旋转的速度（Roll角）。此外，干扰增加了髁突表面沿近外侧方向运动的变化。结论：咬合平衡接触的干扰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.