アブストラクト（21巻2号：神奈川歯学）

神奈川歯学

Japanese

Title　： タッピング衝撃に対する歯および頭部の振動応答特性
Subtitle　： 原著
Authors　： 近藤永, 松尾悦郎
Authors（kana）　：
Organization　： 神奈川歯科大学歯科補綴学教室第一講座
Journal　： 神奈川歯学
Volume　： 21
Number　： 2
Page　： 213-231
Year/Month　： 1986 / 9
Article　： 原著
Publisher　： 神奈川歯科大学学会
Abstract　： 「緒言」咬合音解析に関する研究はStewart Wattを始めとして多くの研究者によって行われている. 近年, 客観的な診断と治療効果の判定を目的とする機器の進歩とあいまって, 咬合音解析や, 歯の動揺度診断における研究が盛んに行われるに至っている. 咬合診断の一助となる咬合音解析は, 補綴領域においては, 生体と調和した補綴物の製作, 咀嚼圧の均等配分という理念を目的としており, これに関して当教室では補綴物, ならびにこれを受入れる生体側の振動特性解明に種々な基礎的研究を行ってきた. 一方, 咬合音診断の直接的な研究としては, Watt, 杉崎, 松尾, 永木, 伊藤らの頭蓋各部にマイクロフォンや加速度ピックアップ等のTransducerを設置し, 骨伝導音として解析したもの, 芦沢, 織田, 高宮らのマイクロフォンを口腔前方において空気伝導音として集音分析したもの等がある.
Practice　： 歯科学
Keywords　： Tapping, C-O, FFT

English

Title　： Response characteristics of Tooth and Head to Impact of Tapping
Subtitle　：
Authors　： Nagao KONDO, Etsuro Matsuo
Authors（kana）　：
Organization　： 1st Department of Prosthetic Dentistry, Kanagawa Dental College
Journal　： Kanagawa Shigaku
Volume　： 21
Number　： 2
Page　： 213-231
Year/Month　： 1986 / 9
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] : Much research has been conducted in many areas on analysis of occlusal sound as ME instruments continue to undergo improvements. The author, in his analysis of occlusal sound, used premature contact sounds at the tooth and the frontal head region and recognized the need to know differences in vibratory characteristics at different locations. An accelerometer pick-up was placed directly on the tooth to directly pick up vibration and another pick-up was pressed against the frontal region of the head to pick up vibration via the bone. Vibration was input to a 2 ch FFT capable of simultaneous recording. Analysis was carried out in terms of the frequency range and time range. Results were as follows. 1. Results of frequency analysis showed that only premature contact of metal on the tooth could be distinguished from centric occlusion. It was difficult at the frontal head region to distinguish differences in the state of occlusion. 2. Measuring vibration duration time showed a tendency in centric occlusion toward longer duration in the frontal head region compared with the tooth. The opposite was true when artificial premature contact was applied. 3. Measuring vibration transfer time showed that there was a tendency for transfer time to decrease going toward the back teeth when applying artificial premature contact. 4. Examining the degree of attenuation at peak level showed that all artificial premature contacts gave greater values than the central occusal position. 5. As the above shows, using tapping as the vibration source when measuring vibration at the tooth and frontal head region under various conditions displayed numerous differences in characteristics at the different locations. Results show that, when conducting occlusal analysis using a time range waveform as a basis, using the tooth as the measuring location prevents the influence of various other vibration media, making possible better analysis.
Practice　： Dentistry
Keywords　： Tapping, C-O, FFT