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Development of analyzing system in temporomandibular joint sound for TMD diagnosis

颞下颌关节音诊断TMD分析系统的研制

基本信息

批准号：
10671847
负责人：
SHIGA Hiroshi
金额：
$ 2.24万
依托单位：
The Nippon 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：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10671847/
关键词：
TMJ sound Craniomandibular disorder Mandibular movement Power value 累積周波数値

项目摘要

It is well believed that examining temporomandibular joint (TMJ) sound would often give valuable information on the existence or degree disorder in the internal part of TMJ where direct vision is impossible. Recently TMJ sound recorded with microphone or acceleration sensor FFT treated and were quantitatively analyzed such as observing the patterns of power spectra and calculating the cumulative frequency values. However, due to the fact that each subject gave different pattern, and the fact that even normal subject had TMJ sound frequency component, the usefulness of quantitative evaluation of TMJ sound has not been confirmed for diagnosis of temporomandibular disorder (TMD).Thus in this study, we attempt to develop new diagnostic system that can easily record TMJ sound with mandibular movement, easily and rapidly analyze, and easily determine normal or abnormal sound in private dental office.From the results in this study, we could establish the diagnostic system for TMJ sound of TMD patient. The system consists of recording, analyzing and evaluating systems. The recording system can simultaneously record TMJ sound and mandibular movement during habitual open/close cycle, the analyzing system can rapidly calculate the raw wave, the occurrence point on mandibular movement, power spectra, cumulative frequency values, total power value and each power value every 50 Hz of TMJ sound, and the evaluating system can visibly compare and evaluate the property of TMJ sound using the radar chart produced from each power value every 50 Hz.By making use of this new system in examination, diagnosis and management for TMD, the pathology of TMD could be represented by objective and quantitative analysis of TMJ sound.

颞下颌关节音的检查常被认为能提供有关颞下颌关节内部存在或程度紊乱的有价值的信息，而颞下颌关节内部是无法直视的。近年来，利用麦克风或加速度传感器记录TMJ声信号，并对其进行FFT处理和定量分析，如观察功率谱图和计算累积频率值。然而，由于每个受试者给出的模式不同，而且即使正常受试者也有TMJ声音频率成分，因此TMJ声音的定量评价对诊断颞下颌关节紊乱病（TMD）的有用性尚未得到证实。本研究结果可为建立TMD患者TMJ音的诊断系统提供依据。该系统由记录系统、分析系统和评价系统组成。该记录系统可同时记录TMJ音和习惯性开/闭周期中的下颌运动，分析系统可快速计算TMJ音的原始波形、下颌运动发生点、功率谱、累积频率值、总功率值和每50 Hz的各功率值，该评价系统能以每50 Hz的功率值产生的雷达图直观地比较和评价TMJ声的特性，颞下颌关节音的客观定量分析可反映颞下颌关节紊乱病的病理变化。