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Development of objective diagnostic system of tooth mobility

牙齿松动客观诊断系统的研制

基本信息

批准号：
08455198
负责人：
OKA Hisao
金额：
$ 1.41万
依托单位：
Okayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455198/
关键词：
tooth mobility clinical tooth mobility manual examination mechanical vibration dental implant piezoelectric ceramics mechanical mobility バイモルフ

项目摘要

Tooth movement examination is important in estimating the condition of the periodontium. Though dental implant treatments in the aged of Japan are very valuable from the viewpoints of quality of life, a diagnostic method for implantation is still not established. This study aims a development of objective diagnostic system of tooth mobility. The authors have already developed the automatic diagnosis system of tooth mobility and have used it in clinical experiments. It is, however, fairly large because of the requirement for a personal computer for data sampling and analysis. The developed tooth mobility tester (T-M tester) for clinical use is composed of a measurement probe and system amplifier and is characterized by its portable size and rapid measurement. A single-frequency vibration is applied to the tooth surface, and an acceleration response is detected. The measured value is newly proposed as the index of tooth mobility, termed the mobility index (MI).For three years of the research period, the T-M tester I and II for clinical experiments have made on a trial basis and the clinical evaluation of them is made. After the modification for minor details, the objective diagnostic system of tooth mobility has been completed. The measuring probe has an overall length of 120 mm and the pointed end of the probe is a cylindrical shape of 10 mm in diameter within bender-type piezoelectric ceramics. The handle of probe is bent at an angle of 15 degree, so as to be easily inserted in the mouth. The measurement frequency is 400 Hz. The clinical applicability this probe and tester is confirmed using an artificial tooth model and human teeth, though the end of probe is inserted into a disposable covering. The coefficient of measurement variation is within several %.

牙齿移动检查是评估牙周组织状况的重要手段。虽然从生活质量的角度来看，日本老年人的牙科植入治疗非常有价值，但尚未建立植入的诊断方法。本研究旨在开发牙齿松动度的客观诊断系统。作者已研制出牙齿松动度自动诊断系统，并用于临床实验。然而，由于需要个人计算机进行数据采样和分析，该系统相当大。研制的牙松动度测试仪（T-M测试仪）由测量探头和系统放大器组成，具有体积小、测量速度快的特点。对齿面施加单频振动，检测加速度响应。提出了一种新的牙齿松动度指标--松动度指数（mobility index，MI），并在三年的研究期内，试制了T-M Ⅰ型和Ⅱ型临床实验用测试仪，进行了临床评价。经过一些细节的修改，完成了牙齿松动度的客观诊断系统。测量探头的总长度为120 mm，探头的尖端为弯曲型压电陶瓷内直径为10 mm的圆柱形。探头手柄弯曲15度，便于插入口腔。测量频率为400 Hz。使用人工牙模型和人牙证实了该探针和测试仪的临床适用性，尽管探针末端插入一次性覆盖物中。测量变异系数在几个百分点以内。