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Establishment of analysis method of nocturnal bruxism by a jaw tracking device in six degrees of freedom

六自由度下颌跟踪装置夜间磨牙症分析方法的建立

基本信息

批准号：
12671887
负责人：
TAKEUCHI Hisahiro
金额：
$ 1.92万
依托单位：
The University of Tokushima
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2002
项目状态：
已结题

项目摘要

As a result of the comparison between the theory value and the measurement value of magnetic field generated by BS-3, the maximum error among them was 0.65%. Moreover, when the distance between upper and lower mandible sensor coils brought it close within 50mm, it influenced the measurement data.2. Measurement methodsA new method of fixing upper sensor to subject using glasses and a new coordinate system defined by extra oral representative points (Camper plane coordinate system) were developed in order to measure mandibular movement without influencing measurement environment. To evaluate the utility of new methods, we measured mandibular movement of a denture wearer and a hemimandibulectomy patient using them. As a result of this study, the new methods allowed us to measure and analyze mandibular movements with acceptable precisely.3. Method of processing measurement dataWe contrived an efficient data processing by using signal analysis property of FFT and IFFT, and developed its computer simulation program with Microsoft Visual C++. As a result of computer simulation study, the method was a suitable for data processing of BS-3. For instance, the volume of stored data had been reduced to about 1/80 of amount of raw data.4. Miniaturization of sensor coilWe are examining the miniaturization of sensor coils by using spheroidal cores of the diameter 2.8, 5.0 and 9.0mm to fix them into mouth.

将BS-3产生的磁场理论值与实测值进行比较，最大误差为0.65%。此外，当上下颌骨传感器线圈之间的距离使其接近50 mm时，会影响测量数据。测量方法为了在不影响测量环境的情况下测量下颌运动，提出了一种用眼镜将上传感器固定到受试者身上的新方法和一个由额外的口腔代表点定义的新坐标系(Camper平面坐标系)。为了评估新方法的实用性，我们测量了一名义齿佩戴者和一名半下颌切除患者的下颌运动。作为这项研究的结果，新的方法使我们能够以可接受的精确度测量和分析下颌运动。测量数据的处理方法利用FFT和IFFT的信号分析特性，设计了一种高效的数据处理方法，并用Microsoft Visual C++开发了其计算机仿真程序。计算机模拟研究结果表明，该方法适用于BS-3卫星的数据处理。例如，存储的数据量已减少到原始数据量的约1/80。传感器线圈的小型化我们正在研究传感器线圈的小型化，使用直径为2.8、5.0和9.0 mm的球形芯子将它们固定在嘴里。