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

目的：研究颞下颌关节不对称性与TMJ载荷的生物力学关系。对象：10名咬合良好的女性受试者。方法：采用6自由度运动捕捉系统，同步记录咬合力、咬合面积和下颌运动。每名受试者在习惯咀嚼侧的磨牙咬合面上分别在有无人工牙合干扰的情况下咀嚼口香糖。结果：牙合干扰的插入增加了下颌绕前后轴旋转的速度(滚动角)。结论：咬合平衡接触的错位可能导致TMJ错乱。

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.