アブストラクト（18巻3号：神奈川歯学）

神奈川歯学

Japanese

Title　： 咬合時に加わる衝撃の上下顎配分比に関する研究 (第1報)
Subtitle　： 原著
Authors　： 松尾悦郎, 小笠原嘉一, 近藤永, 戸田篤志, 城所善夫*, 金安英治
Authors（kana）　：
Organization　： 神奈川歯科大学補綴学教室第一講座, *神奈川歯科大学生理学教室
Journal　： 神奈川歯学
Volume　： 18
Number　： 3
Page　： 319-327
Year/Month　： 1983 / 12
Article　： 原著
Publisher　： 神奈川歯科大学学会
Abstract　： 「緒言」 咬合によって歯に加わった力が全身特に頭部にどのような状態で伝達されるかを知ることは顎口腔系と調和のとれた補綴物を製作するための一つの重要な課題である. 特に残存歯と共存するという特殊性とその構成要素の複雑なパーシャルデンチャーにおいては, 支台歯の保護, 与えるべき咬合様式と設計等の観点からも, その事項を明確にすることが急務とされている. 本教室ではこれらの基本的動態を解明すべく咬合力を動的荷重と見なしその振動伝達特性と頭蓋骨, 歯周組織, 支台歯及び維持装置との関連について一連の研究を行ってきたが実際の咬合時にどの程度の加速度がどのような様相で歯に加わるかが問題となった. そこでわれわれは咬合時に歯に加わる衝撃加速度の様相を解明する目的でその基礎的実験をヒト成人乾燥頭蓋にて行い多少の知見を得たので報告する. 「材料および方法」 1. 実験試料とその調整 実験試料はゼネラルサイエンス社のヒト成人乾燥頭蓋を使用した.
Practice　： 歯科学
Keywords　：

English

Title　： Research on the Ratio of G-Distribution Between the Upper and Lower Jaws (I)
Subtitle　：
Authors　： Etsuro MATSUO, Kaichi OGASAWARA, Nagao KONDO, Atsushi TODA, Yoshio KIDOKORO*, Eiji KANAYASU
Authors（kana）　：
Organization　： 1st Department of Prosthetic Dentistry, Kanagawa Dental College, *Department of Prosthetic Dentistry, Kanagawa Dental College
Journal　： Kanagawa Shigaku
Volume　： 18
Number　： 3
Page　： 319-327
Year/Month　： 1983 / 12
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： Abstract : Knowledge of how occlusal force on the teeth is transmitted through the head is an important factor in constructing a prosthesis which harmonizes with the stomatognathic system. Particularly, in constructing removable partial dentures where a load is placed on the remaining teeth and the mucous membrane, it is important to understand the nature of occlusal force out of consideration for such matters as preservation of the abutment teeth, establishment of a harmonious occlusal relationship between the opposing and remaining teeth, and prosthesis design. In order to gain an understanding of these fundamental problems, occlusal force was considered at this research unit as a form of impact and a series of studies were made to investigate characteristics of transfer vibration and its relationship to the skull, the periodontal tissue, the abutment teeth and their retainers. However, the actual level of acceleration occlusion as well as the nature of how acceleration was transmitted to the teeth remained unclear. In an attempt to understand the nature of impact acceleration during, a study was made using a dry human skull. Impact during occlusion was measured with an accelerometer pick-up on the top of the teeth in the skull. In analyzing the data on vibration, use was made of a three-dimensional overall view system developed in this laboratory. The following results were obtained concerning differences in the G-distribution ratio between the upper and lower jaws. 1. Differences in impact force between the left and right teeth were lost as a result of vertical occlusal equilibration. 2. The impact on the lower jaw during occlusion was greater and displayed a tendency towards increasing force progressing from the molars to the front teeth. 3. At an opening distance of 1.0 cm the G-distribution ratio between the upper and lower jaw 1 : 1.32-1.39. 4. At an opening distance of 0.5 cm the G-distribution ratio between the upper and lower jaw was not stable but in the area of 1 : 0.99-1.45.
Practice　： Dentistry
Keywords　：