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

颞下颌关节髁突和椎间盘运动的磁共振成像研究

基本信息

批准号：
01571058
负责人：
MIZUTANI Hiroshi
金额：
$ 1.34万
依托单位：
Tokyo Medical and Dental University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01571058/
关键词：
TMJ Condyle TMJ Disk Internal Derangement of TMJ TMJ Dysfunction MRI Dual coil 顎関節内症顎頭デュアルコイン

项目摘要

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.

本研究的目的是研究颞下颌关节髁和椎间盘的运动。 MRI仪器用于观察TMJ盘（真正的软组织）和TMJ髁的运动。 MRI对髁突和椎间盘的采集最近才开始，其技术条件尚未确定。因此，本研究首先着手建立它们。本研究使用了两台MRI仪器，1.5和0.2 tesra。相互比较发现，1.5 tesra 的 MRI 在信噪比和图像清晰度方面优于 0.2 tesra 的 MRI，但后者足以用于临床。至于线圈，采用了改进的表面线圈。该线圈的特点是：由于它可以同时切除两侧颞下颌关节，因此缩短了想象时间，减轻了患者的痛苦。但线圈还需要进一步改进，因为它不足以判断椎间盘的准确位置和运动。目前，除了将下颌运动分成距离最大张开点0、2、4、···毫米的几个固定点，并在每个点进行MRI，用MRI分析TMJ的运动之外，没有其他手段。因此，他们在电影胶片上的下颌运动并不那么平滑，可能与真实的下颌运动有很大不同。在这项研究中，患者的右侧椎间盘被判断位于最大开口点处的髁突前方，并且右侧髁突的吸收比左侧多。从这些来看，患者的右侧颞下颌关节可能存在问题。这一结果与他的临床症状相符，MRI 仪器可能有助于诊断颞下颌关节功能障碍。