アブストラクト（20巻3号：神奈川歯学）

神奈川歯学

Japanese

Title　： モーダル解析からみた接触点の歯列におよぼす影響
Subtitle　： 原著
Authors　： 金子恵孝
Authors（kana）　：
Organization　： 神奈川歯科大学補綴学教室第I講座
Journal　： 神奈川歯学
Volume　： 20
Number　： 3
Page　： 369-393
Year/Month　： 1985 / 12
Article　： 原著
Publisher　： 神奈川歯科大学学会
Abstract　： 「緒言」咬合の保全に大きな意義を持つ歯列の状態は, これを構成する各々の歯の咬合接触関係と隣接接触関係によって左右される. とくに隣接接触関係は, 接触点の解剖学的状態によって影響を受け, 多くの研究によってそのあり方が検討されている. 接触点の解剖的問題の解明にあたり, 特に位置については山下, 総山, 渡辺, Pichler, Hirschfeld, 今川, Wheeler, によって, 形態については山下, Fee, 総山, Pichler, Walkhoffら, Philipp, Tylman, 草刈らによって, また, 接触点強さについては草刈らによって多くの研究がなされており, 正常な接触点のあり方を報告している. また, これらの解剖的研究を更に発展させ, 歯の変位との関係を3次元的に明らかにした小笠原, 吉田, 飯原の研究が近年なされ, 補綴や保存の立場から修復物の接触点のあり方が検討されている.
Practice　： 歯科学
Keywords　：

English

Title　： Influence of Contact Points on the Dental Arch seen in terms of Modal Analysis
Subtitle　： Original article
Authors　： Yoshiyuki KANEKO
Authors（kana）　：
Organization　： 1st Department of Prosthetic Dentistry, Kanagawa Dental College
Journal　： Kanagawa Shigaku
Volume　： 20
Number　： 3
Page　： 369-393
Year/Month　： 1985 / 12
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： The significance of contact points in a prosthesis has been the object of varied studies in clinical dentistry but research so far has been limited to experiments with models where static weight is used. As a result, the theoretical background to this subject remains unclcar even today. The contact relationship between adjacent teeth is a basic structural element in the stomatognathic system which includes the dental arch. Thus, a solution to the above problem is most desirable. Since the 1965 release of the Fast Fourier Transform(FFT), Modal Analysis has been used in clarifying vibratory characteristics. Use of modal analysis in dentistry has included reports from Matsuo and Shirasawa on the resonance frequency of tooth as well as on conditions necessary in anlysis methods. In this study, the author made use of modal anlysis to measure contact relationship between adjacent teeth in a static state and to detect the vibratory characteristics of the dental arch. The following results were obtained. 1. It was possible with Modal Anlysis to determine the dimensional movement of the dental arch and the jaw. 2. In a normal dental arch(i. e. a dental arch where there is contact relationship between adjacent teeth)the movements of the dental arch and jaw were synchronized. In other words, it was discovered that the dental arch and jaw responded as a system. In addition, this phenomenon was observed at a vibration mode of approximately 1500-2000Hz. 3. Loss of contact relationship between adjacent teeth brought about a definite change in mode in response to dental arch movements. In other words, dimensional movements of the dental arch as part of a system could not be observed. The teeth moved separately. 4. In the mandible of a normal dental arch there is a unique tortional vibation mode and this mode was in the area of 700Hz.
Practice　： Dentistry
Keywords　：