A Study on Movenent of TMJ Condyle and Disk with Magnetic Resonance Imaging

本研究的目的是对TMJ空调和磁盘的调查运动。核磁共振成像仪器曾用于观察TMJ磁盘的移动，其中实际上是一个软的系统和TMJ条件。MRI最近推出了一个空调和磁盘，但其技术条件尚未确定。因此，这项研究首先建立在可靠的基础上。两套核磁共振仪器， 1.5和0.2特斯拉，已经在这项研究中使用过。与另一个相比，发现了1.5特斯拉核磁共振成像优于0.2特斯拉，与S/N比率和图片清晰度相比，但后来的一个在临床上足够使用。作为线圈，一个改进的表面线圈被使用。这个线圈就是你的特点;它使想象的时间缩短和病人感觉不到的痛苦，所以它可以在同一时间采取TMJ的两侧。如何，线圈还应该改进更多，因为它不够充分来判断磁盘的精确位置和运动。在当前时间，没有其他意味着除了在几个固定点的距离是0、2、4、......百万人远离最大打开点，并在每个点进行MRI分析TMJ的运动。因此，他们在电影胶片上的Mandibular运动并不那么光滑，也可能与他们真正的电影有很大的不同。在这项研究中，患者的正确磁盘被判断为在最大的开场点处于异常状态，并且正确的Condyle比左边的要好。从这些方面来判断，病人可能会有一个正确的TMJ问题。这一结果与他的临床缺陷结合在一起，而且MRI仪器可能被用于诊断TMJ功能失调。

The purpose of this study is to investigate movement of TMJ condyle and disk. MRI instruments were used to observe movement of TMJ disk which is really soft tissue and TMJ condyle. Taking condyle and disk by MRI has started recently, and its technical conditions have not been established yet. Therefore, this study was firstly set out to establish them.Two MRI instruments, 1.5 and 0.2 tesra, were used in this study. Comparing from one another, it was found that MRI of 1.5 tesra was superior to that of 0.2 tesra as regard to the S/N ratio and clearness of pictures, but that the later one was enough to be clinically used.As for the coil, an improved surface coil was used. The characteristics of this coil are those ; It makes the imagine time shorter and patients feel less suffering since it can take both sides of TMJ at the same time. However, the coil should be improved still more, because it is not useful enough to judge accurate position and movement of the disk.At the present time, no other means are left except dividing mandibular movement into several fixed points where the distance is 0, 2, 4, ・・・Millimeters away from maximum opening point and taking MRI at each point for analysing the movement of TMJ with MRI. Therefore, Their Mandibular Movement on cine film were not so smoothed and could be very different from their real one.In this study, the right disk of the patient was judged to be situated anteriorly from the condyle at the maximum opening point, and the right condyle resorbed more than the left. Judging from these, the patient might have a problem with right TMJ. This results coincided with his clinical complaints, and the MRI instrument is probably useful to diagnose TMJ dysfunction.