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Diagnostic Application of Functional Coupling between Jaw Function and Balanced Head Movement

颌功能与头部平衡运动功能耦合的诊断应用

基本信息

批准号：
12557167
负责人：
KOHNO Shoji
金额：
$ 3.9万
依托单位：
NIIGATA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12557167/
关键词：
jaw movement head movement evaluation of jaw function 顎機能評価法

项目摘要

We have previously demonstrated the existence of a functional-coupling between the head and the mandible. The objective of the present study was to reveal mechanisms of this functional coupling and effects of occlusion on this coupling.We measured tridimensionally both the movement of the head and mandible and the electromyographic activities in the masticatory and head-neck muscles in healthy subjects and patients of temporomandibular disorders.In healthy subjects, heads moved cyclically in the same cycle time as that of both masticatory and tooth-tapping jaw movements. The head underwent a rotation-like sagittal movement whose rotation center located above the cranial base point. The masticatory muscles and the neck muscle (the stemocleidmastoid muscle) showed rhythmical activities synchronized with jaw movements. The neck muscle activity showed a linear correlation with masticatory force. Additionally, it was seem that the neck muscle began the activity before the occlusal phase of jaw movements. It is demonstrated that the neck muscle contribute to the synchronized head movement in the anticipatory manner. However we could not confirm that this coordinated head movement would influenced on whole body flicking.In patients of temporomandibular disorders, the degree of synchronization between head and jaw movement was approximately three-quarters of that with healthy subjects during mastication and tooth-tapping. This variable was influenced by existence of TMD symptoms, especially limited jaw opening, which suggests mechanical feature of the coupling between head and jaw movement. Contribution of occlusal features to head movement has not been confirmed in our study.

我们以前已经证明了头部和下颌之间存在功能耦合。本研究的目的是为了揭示这种功能耦合的机制以及咬合对这种耦合的影响。我们对健康受试者和颞下颌关节紊乱症患者的头部和下颌的运动以及咀嚼和头颈部肌肉的肌电活动进行了三维测量。在健康受试者中，头部的周期性运动与咀嚼和敲牙的下颌运动周期相同。头部呈旋转状矢状运动，旋转中心位于颅底基点上方。咀嚼肌和颈部肌肉(茎乳突肌)表现出与下颌运动同步的节律性活动。颈部肌肉活动与咀嚼力呈线性相关。此外，颈部肌肉似乎在下颌运动的咬合期之前就开始活动了。结果表明，颈部肌肉以预期的方式参与了头部的同步运动。然而，我们还不能确定这种协调的头部运动是否会影响全身的闪烁。在颞下颌关节紊乱病患者中，在咀嚼和敲牙过程中，头部和下颌运动的同步度大约是健康受试者的四分之三。这一变量受TMD症状的存在，尤其是张口度受限的影响，提示了头颌运动耦合的力学特征。在我们的研究中，咬合特征对头部运动的贡献尚未得到证实。