アブストラクト（28巻1号：神奈川歯学）

神奈川歯学

Japanese

Title　： 上顎連結装置の形態差が義歯の動態に与える影響について
Subtitle　： 原著
Authors　： 加藤将人, 松尾悦郎
Authors（kana）　：
Organization　： 神奈川歯科大学歯科補綴学第I講座
Journal　： 神奈川歯学
Volume　： 28
Number　： 1
Page　： 36-51
Year/Month　： 1993 / 6
Article　： 原著
Publisher　： 神奈川歯科大学学会
Abstract　： 「緒言」パーシャルデンチャーの構成要素のうち, 床および連結装置は咬合圧で容易に変形したり破損しないことが望まれ, それに対応する材質および形態が要求されている. 更に, 一方ではアメニティーの問題から感覚および発音に障害を起こさないものが望まれている. とくに, 強度面からみた遊離端欠損症例においては, 機能時に生じる義歯の沈下やねじれ等の変位により義歯床下組織や支台歯に過大な機能圧が伝達されることにより, 支台歯の負担荷重, 粘膜の疼痛および歯槽骨の吸収などの悪影響を及ぼす要因となる. そこで, 連結装置の変形を防ぐために形態的および材質的に強度の向上を計ったり, 義歯床面積を可及的に広くして義歯の安定面から対処する等の対策がとられている. これらに関係した報告で, Barbenelは積分計算から口蓋の湾曲度が大きくなる程, また, バーの長さが長くなる程バーの変位量が増大すると報告し, 歪み計を用いた関根らの研究では, 遊離端義歯に荷重を加えた場合, 床近接部に強い曲げを認めた応力が集中し, また連結装置の厚径の増加に伴い変位量は減少するという報告を行っている.
Practice　： 歯科学
Keywords　： モーダル解析, 連結装置, 上顎遊離端義歯

English

Title　： A Study on Denture Movement Due to Form Differences of Maxillary Connectors
Subtitle　：
Authors　： Masato KATO, Etsuro Matsuo
Authors（kana）　：
Organization　： The 1st Department of Prosthetic Dentistry, Kanagawa Dental College
Journal　： Kanagawa Shigaku
Volume　： 28
Number　： 1
Page　： 36-51
Year/Month　： 1993 / 6
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： Abstract : In designing the base structure and the connector in partial denture, it is important to make proper selection of the material and the morphology used to prevent them from easy deformation and damage when they are subjected to occlusal pressure. Efforts have been made to improve connector strength and the functional pressure enduring capability by expanding denture base area as much as possible. In the present research, we have studied the effects of the design of the connectors to the supporting teeth and denture by using three types of connectors and comparing the dynamic characteristics between two states of denture(an unrestrained free state and an occlusion state). For use in the study, three types of connector, a component used commonly for correcting the maxillary saddle deficit(palatal bar, palatal strap, and palatal plate)were created. Following are the results. 1. Three different resonance modes were detected in all the denture specimens incorporating these connectors. In the resonance mode of #1, the rigid-mode resonance characteristic of these dentures was detected. 2. In those modes involving bending and torsion elements, the points of the inflection were located along the finishing line or at the boundary section between the metallic frame and the resin base in the lower of the artificial teeth. 3. In all the specimens the larger degrees of displacement were measured in the impact sides than in the opposite sides. 4. Fixing of these specimens to restrain their free movement caused the degree of displacement in the sides opposite to the impact sides restrained to less than about a half of the degree measured when they were impacted under free-moving conditions. 5. As for the mechanical strength of connector, the plate-type connectors exhibited smaller longitudinal deformations than that in the bar-type and strap-type counterparts, irrespective of the methods used to fix the specimens.
Practice　： Dentistry
Keywords　：