Three-dimensional Functional Dynamics of Removable Prosthetics

可拆卸假肢的三维功能动力学

基本信息

批准号：
08672229
负责人：
KATO Mitsuo
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 Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

The removable partial denture (RPD) designed without mature consideration shows unfavorable movement in oral cavity during function. In our conception, the RPD designed for minimizing the mobility is much favored to maintain the oral health. The actual behavior of RPD during jaw functions, however, is unknown. Then we reserch the new measuring system for dynamic behavior of RPD.We made a measurement system on a trial basis in 1995. This system puts a theory of stereophotograph in practices. The three reference points were attached on the RPD with an extension rod. Two sets of subminiature-camera were fixed on the head of the patient, and the images of the points in each camera were recorded on videotape at a time. Two-dimensional positions of each point was obtained form graphic data processing of stilled images of the records. The space coordinates of each point might be calculated from the values of rectangular plane coordinates of it. Through the relation between positions of each point, the change of position of any point on the RPD could be measured with time. The results of calibration and some examples were reported at the Japan Prosthodont Society in 1996, and a paper, titled 'Three-dimensional Dynamics of Removable Prosthetics Part 1. Measuring System and Observation", was written for the Journal of Japan Prosthodont Society in 1997. From these, though the accuracy was not fully enough, this system was concluded to be useful in measuring the dynamic behavior of RPD.

未经过成熟考虑而设计的可摘局部义齿（RPD）在功能过程中表现出不利的口腔运动。在我们的构想中，旨在最大限度地减少活动性的 RPD 非常有利于保持口腔健康。然而，RPD 在下颌功能过程中的实际行为尚不清楚。然后我们研究了新的RPD动态行为测量系统。我们于1995年试制了一个测量系统。该系统将立体摄影的理论付诸实践。三个参考点通过延长杆固定在 RPD 上。将两组微型摄像机固定在患者头部，将每台摄像机中各点的图像一次记录在录像带上。每个点的二维位置是通过对记录的静止图像进行图形数据处理获得的。每个点的空间坐标可以根据其直角平面坐标值计算出来。通过各点位置之间的关系，可以测量RPD上任意点的位置随时间的变化。 1996年，日本假牙协会报告了校准结果和一些例子，1997年在日本假牙协会杂志上发表了一篇题为“可移动假肢的三维动力学第1部分：测量系统和观察”的论文由此看来，尽管精度不够，但该系统对于测量 RPD 的动态行为很有用。