A Study of a Mandibular Position with EMG Biofeedback Method

本研究旨在通过颈部反射和肌电生物反馈的方法，明确下颌体位的特点，并将其与一般的下颌体位方法中的中心体位、叩击体位、尖间体位等进行比较。在此基础上，探讨颈部反射和肌电生物反馈法确定的下颌位置能否成为临床上确定咬合位置的标准。因此，某被试作为颞下颌关节功能障碍患者和正常牙列受试者进行了如下实验。采用Check bite法记录下颌中心位置、叩击位置、肌肉位置、心肌位置以及whis法的5种下颌位置。使用上颌研究模型和硅胶检查牙对下颌位置进行测量。同时将MKG的输出记录在数据记录仪上，并对下颌位置进行三维分析。从上述实验来看，颈部反射和肌电生物反馈显示，下颌位比中心位更前，比叩击位更后。肌肉位置数据位于颈部反射和肌电生物反馈法数据周围，与下颌位置相比，该方法显示出较大的向偏移变化。该方法在垂直方向上显示心肌位置与下颌位置相似。实验对象为颞下颌关节功能障碍患者，颈部反射和肌电生物反馈显示其下颌位置与正常人相似。另一方面，TMJ功能障碍患者的标准差变化越来越大。颈部及肌电生物反馈法在正常及颞下颌关节功能障碍患者中较上述一般方法更为稳定。上述实验结果证实了颈部反射和肌电生物反馈法确定下颌位置是临床有效的咬合位置的决定方法，并且对生殖特性有良好的影响。少

This research is to clarify a characteristic of a mandibular positione by neck reflex and EMG Biofeedback method comparing a mandibular position by a centric position, tapping position, intercuspal position etc. of general method in mandibular position.It is to search whether a mandibular position by neck reflex and EMG Biofeedback method is able to become a standard of an occlusal position decision clinically on the basis of these result. Thereupon, a testee carried out the following experiment as the TMJ dysfunction patient and normal dentitition subjects. A mandibular position by Check bite method, was recorded about 5 kind of mandibular position of a centric position, tapping position, muscle position, myocentric position and also that of whis method. It carried out the measuring of a mandibular position by using a maxillary study model and Silicone Checkbite. The output of MKG was recorded to Data Recorder simaltinously and a madibular position was analized in three dimentions.Fro … More m the mentioned experiment, a mandibular position by neck reflex and EMG Biofeedback is to anterior than a centric position and was doing an aspect posterior barely than tapping position. As for a muscle position, the data was located around that of neck reflex and EMG Biofeedback method, and big variations of studard deviation were shown than a mandibular position by this method levelly.It was seen as myocentric position is resembling to amandibular position by this method in vertical direction. With the experiment used the TMJ dysfunction patient , it was semilar trend to a mandibular position of normal subjects by neck reflex and EMG BIofeedback method. On the other hand, the variation of standard deviation was becoming larger in TMJ dysfunction patient. Neck and EMG biofeedback method in comparison with above mentioned general method was most stable in normal and TMJ dysfuction subject. The aforementioned experiment result was confirmed that a mandibular position by neck reflex and EMG Biofeedback method is clinical effective as the decision method of an occlusal position and be excellent to the characteristic of reproduction. Less