Development of Diagnosing system using TMJ sounds

开发利用颞下颌关节声音的诊断系统

• 批准号: 08557116
• 负责人: MICHI Ken-ichi
• 金额: $ 1.41万
• 依托单位: Showa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 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-08557116/
• 关键词: TMJ disorders; TMJ sound; Jaw movement; Acoustic Analysis; Analysis of Jaw movement; 音響学的特徴; 客観的評価

Abstract : This study was done to establish the methodology for analyzing synchronously the acoustic signals of temporomandibular joint sound with the jaw movement. The analyzing system consisted of the computerized acoustic analyzer and Sirognathograph analyzing system.Eight asymptmatic adults were served as the subjects. Three detecting methods for acquiring temporomandibular joint sounds using an electret condenser microphone were evaluated. Three types of detecting method were as follows.Method 1 : An electret condenser microphone was fixed in the external auditory canal using adhesive tapes. The external auditory canal was partially open in this method.Method 2 : An electret condenser microphone was fixed in the external auditory canal using impression material. The external auditory canal was tightly closed in this method.Method 3 : An electret condenser microphone was fixed using impression material with an air vent tube. The external auditory canal was tightly closed but keeping air vent in this method. Method 3 was evaluated to be the most suitable method for detecting the temporomandibular joint sounds because this method showed the greatest signal to noise ratio.Using this method, the acoustic characteristics of the temporomandibular joint sounds were evaluated.The results were as follows.Coefficient variance of the duration between the beginning of jaw movement and the point of the maximal amplitude of temporomandibular joint sound was smaller than that between the beginning of the jaw movement and the beginning point of the temporomandibular sound in both closing and opening phases of jaw movement. In the one octave band analyses, the frequency bands with the maximal magnitude were different among the subjects.However, the frequency bands with the maximal magnitude were nearly constant in both closing and opening phases of jaw movement in each subject.

摘要：本研究旨在建立颞下颌关节声信号与颌骨运动同步分析的方法学。分析系统由计算机声学分析仪和声图分析系统组成，以8名无症状成人为研究对象。评价了三种利用驻极体电容式麦克风获取颞下颌关节音的检测方法。检测方法有三种。方法1：用胶带将驻极体电容式麦克风固定在外耳道。方法2：用印模材料将驻极体电容式麦克风固定在外耳道内。方法3：用带排气管的印模材料固定驻极体电容式麦克风。该方法外耳道闭合严密，但保持空气通畅。方法3具有最大的信噪比，因此被认为是最适合的检测方法。利用该方法对颞下颌关节音的声学特性进行了评价。结果表明，在闭合和开合两个阶段，从下颌运动开始到最大幅度点之间的持续时间的协方差小于从开始运动到开始时的协方差。在一倍频程频段分析中，最大幅度的频段因受试者不同而不同，但在每个受试者的颌骨运动的闭合和开放阶段，最大幅度的频段几乎是恒定的。

项目成果

山本実佳、佐野司他: "下顎頭のintracapsular fractureの画像所見" 歯科放射線学会誌. 38巻. 42-43 (1998)

Mika Yamamoto、Tsukasa Sano 等：“下颌骨髁突囊内骨折的影像表现”日本牙科放射学会杂志第 38 卷 42-43（1998 年）。

佐野司 他: "Crepitusを伴った顎関節のMR画像所見" 歯科放射線学会雑誌. 37(1). 23-28 (1997)

Tsukasa Sano 等人：“伴有捻发音的颞下颌关节的 MR 图像表现”，日本牙科放射学会杂志 37(1) (1997)。

山本実佳、佐野司ほか: "下顎頭のintracapsular fractureの画像所見" 歯科放射線学会誌. 38巻. 42-43 (1998)

Mika Yamamoto、Tsukasa Sano 等：“下颌骨髁突囊内骨折的影像表现”日本牙科放射学会杂志第 38 卷 42-43（1998 年）。

Sano T, Widmalm, Setal: "Amplitude and frequency spectrom of TMT sounds" J.of Oral rehabilitation. 26. 145-150 (1999)

Sano T、Widmalm、Setal：“TMT 声音的振幅和频谱”J.of 口腔康复。

Tsukasa Sano, Mika Yamamoto, Takayoshi Yamaga Koji Takahashi, Saeko Masuda, Atsuko Tagaya Ken-ichi Michi, Tomohiro Okano: "MR findings of TMJ with Crepitus" J.Japanese Dental Radiology. Vol 37 (1). 23-28 (1997)

Tsukasa Sano、Mika Yamamoto、Takayoshi Yamaga Koji Takahashi、Saeko Masuda、Atsuko Tagaya Ken-ichi Michi、Tomohiro Okano：“TMJ 伴捻发音的 MR 发现”J.Japan Dental Radiology。