A Study of a Mandibular Position with EMG Biofeedback Method

本研究旨在通过对下颌位的正中位、叩击位、牙尖交错位等常规方法的比较，阐明颈反射和肌电生物反馈法的下颌位的特点，并在此基础上探讨颈反射和肌电生物反馈法的下颌位能否成为临床上确定牙合位的标准。因此，受试者作为TMJ功能障碍患者和正常牙列受试者进行了以下实验。用Check bite法记录下颌骨的中心位、叩击位、肌位、肌中心位和Whis法5种位置。通过使用上颌骨研究模型和硅树脂Checkbite进行下颌位置的测量。同时将MKG的输出信号记录到数据记录仪中，并对下颌位置进行三维分析。 ...更多信息 在上述实验中，通过颈反射和肌电生物反馈的下颌位置是向前而不是中心位置，并且做一个略低于叩击位置的向后的方面。在肌位方面，与颈反射法和肌电生物反馈法相比，肌电生物反馈法测量的肌位在水平方向上与下颌位相差较大，在垂直方向上与下颌位相似。以颞下颌关节功能障碍患者为实验对象，通过颈反射和肌电生物反馈方法，使患者的下颌位置半接近正常人的下颌位置。颞下颌关节功能障碍患者的标准差变大。颈肌生物反馈法对正常人和颞下颌关节功能障碍者的稳定性最好。上述实验结果证实，通过颈部反射和EMG生物反馈方法的下颌位置作为咬合位置的决定方法是临床有效的，并且对于生殖特性是极好的。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