アブストラクト（21巻4号：神奈川歯学）

神奈川歯学

Japanese

Title　： 歯に加わる衝撃の歯根配分に関する研究- 試料の保持方法について -
Subtitle　： 原著
Authors　： 陳重成, 青木宏和, 黒川元次郎, 藤澤国興, 石田正博, 金安英治, 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　： 4
Page　： 583-595
Year/Month　： 1987 / 3
Article　： 原著
Publisher　： 神奈川歯科大学学会
Abstract　： 「緒言」歯に加わった力の伝達様相を解明した研究には維持装置の振動特性, イヌ頭部, ニワトリ下肢の振動伝達特性, ヒト乾燥頭蓋応用の咬合力上下顎分比, 歯のモーダル解析等がある. しかし, 歯に加わった咬合力が各歯根へどの様に伝達されるのか, また加わる力の方向によって差が生じるのか等を解明したものはない. われわれは, これを解明する為の基礎実験として, エポキシ歯にシリコン印象材を人工歯根膜として付与した実験用モデルを作製し, 振動学的に試料固定法等の実験を行い多少の知見を得たので報告する. 「実験試料, 装置及び方法」「1)被験試料」(1)被験歯は天然歯形態を有するエポキシ歯(ニッシン社製I21 D-KAI-A)の左側上顎第1大臼歯とした. 「(2)人工歯根膜」被験歯の根尖に加速度pick-upを確実に固定する目的で, 歯根軸に垂直に根尖部を1mm削合した後, 歯根全面にG-C社製シートワックス＃30(厚さ0.30mm)を2枚重ねて圧接し, これを後述のシリコンで置換した.
Practice　： 歯科学
Keywords　： 加速度, 歯根配分比, 咬合圧伝達方向

English

Title　： Resarch on the Distribution of Impact on the Tooth Among Tooth Roots - A Method of retention for an Experimental Model -
Subtitle　：
Authors　： Shigenari CHIN, Hirokazu AOKI, Motojirou KUROKAWA, Kunioki FUJISAWA, Masahiro ISHIDA, Eiji KANAYASU, Etsuro MATSUO
Authors（kana）　：
Organization　： 1st Department of Prosthetic Dentistry Kanagawa Dental College
Journal　： Kanagawa Shigaku
Volume　： 21
Number　： 4
Page　： 583-595
Year/Month　： 1987 / 3
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract]: Little or no research has appeared up to now about how occlusal forces on the teeth are transmitted to the individual roots or whether differences appear depending on the direction of occlusal force. As a basic experiment in clarifying these matters, the authors created an experimental model by using silicone impression material as an artificial periodontium on an L6 artificial plastic tooth. Random vibration was then applied to the occlusal surface and the linear-value attenuation retes were measured upon reception at acceleration pick-up attached to the apex of each root. The following results were obtained. [Results]: 1) A vice was considered to be the best method of securing the experimental model since there is minimum variation in measured values and limited horizontal movement of the experimental model. 2) Duration of vibration had little influence on the experimental conditions. 3) There was no difference in vibrational force at 1G and 0.3G's. Thus, 0.3G's was considered to be an optimum force considering the dimensions of the experimental model and the limited displacement. 4) When vibration wes applied to the central fossa and the mesiolingual cusp in the direction of the long axis, each root of showed equal vibration in the three directions of long axis, buccal-lingual and mesial-distal. There was little difference among roots in vibration values. 5) The long axis direction following the axis of vibration showed a lower rate of attenuation (5-10 dB) as well as a G-conversion valus 2 to 3 times greater than the buccal-ingual and mesialdistal directions which are perpendicular to the long axis. This means that the direction following the axis vibration displayed greater values.
Practice　： Dentistry
Keywords　：