歯の打診音の測定についての基礎的研究
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概要
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Much can be learned about the percussion sound of the tooth as a clinical diagnostic method of the periodontal condition. The aim of this article is to present the technique of recording sounds made by the tooth percussion and to discuss the significance in the diagnosis of the periodontal disease. Therefore, the author developed a measuring equipment for the percussion sound of the tooth, which consists of a microphon, a magnetic tape deck, a 1/3 octave band analyzer, an oscilloscope, and a camera. As a means of studying materials, three male subjects in possession of normal teeth and periodontal tissue are selected, and their sounds of percussing the teeth are recorded and measured by this equipment. The results of this study were as follows: l. For the purpose of determining quantity and discussing the percussion sound of the tooth, the author developed a new apparatus to percuss the tooth, and discussed a standardizing method of the "percussion sound trace". 2. The frequencies which constitute the percussion sound of the tooth are affectcd by the kinds of the percussion instruments. However the percussion sound has a fundamental frequency, and its range of fundamental frequency is about below 1250 Hz. 3. The peak-peak value of the percussion sound traces is much influenced by the magnitude of the load which percussed the tooth, but the attenuation time of it is less influenced by the load, and the value of fandamental frequency of its sound is little influenced by the load.
- 特定非営利活動法人日本歯周病学会の論文
- 1976-03-28