アブストラクト（24巻1号：神奈川歯学）

神奈川歯学

Japanese

Title　： 下顎遊離端義歯におけるCross arch stabilizationの振動学的解明
Subtitle　： 原著
Authors　： 北條了, 松尾悦郎
Authors（kana）　：
Organization　： 神奈川歯科大学補綴学教室第一講座
Journal　： 神奈川歯学
Volume　： 24
Number　： 1
Page　： 182-206
Year/Month　： 1989 / 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設計において, 支台歯の負担軽減は義歯の機能向上と共に重要な課題である. これらについて, 義歯の受け側としての生体からの研究として, 義歯床下粘膜の被圧変位量についてSohm, Spreng, Voss, 石川ら,平田, 佐藤, 大島, Pfeifferらが一様に荷重部位によって局所被圧変位量が異なると報告し, 負担圧の床下粘膜への均等配分の困難さとこれに起因する支台歯の負担過重を示唆している. 義歯側から見た研究では, 各種支台装置差による支台歯の動揺度測定が, Frechette, Kaires, 竹井, Henderson, Shohet, Claytonら等により行われ, とくにFrechetteは支台歯の変位状態をコンパレータで測定し, レストの数と位置, 連結装置の外形や剛性および義歯床の大きさの大小に影響を受けると報告している. また, 連結装置の設計から支台歯の負担軽減と義歯の変形防止をはかろうとする研究がAnderson, Barbenel, 野首, 関根ら, 前田, 斎藤らにより報告され, なかでも関根らは, 床の移動量は連結装置の厚径の増大に伴って対数比例的に減少すると報告している.
Practice　： 歯科学
Keywords　： 連結装置, 遊離端義歯, 変位量

English

Title　： An Elucidation of Cross Arch Stabilization for the Lower Unilateral Free End Denture in Terms of Vibratory Science.
Subtitle　： Original article
Authors　： Satoru HOJYO, Etsuro Matsuo
Authors（kana）　：
Organization　： The 1st Department of Prosthetic Dentistry. Kanagawa Dental College
Journal　： Kanagawa Shigaku
Volume　： 24
Number　： 1
Page　： 182-206
Year/Month　： 1989 / 6
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： Abstract : Cases of lower unilateral free end defect are the source of many problems in clinical dentistry. The denture design method most commonly used is cross arch stabilization which involves creating a retainer on the side opposite the defect via a bar in order to stabilize the denture and protect the retaining teeth. Almost all research on this method involves experiments using a static load. Moreover, there are few studies that attempt to clarify the relationship between the major connector and the retaining teeth. As a means of clarifying these problems, the authors used the modal analysis method and a vibrometer, both of which have proven effective in general observation of lowr denture dynamics when dynamic force is applied. This allowed them to see the relationship between the metal framework configuration and the retainer in animation and thereby study displacement quantity and damping quantity. The following interesting were obtained. 1. There were four modes detected for fixed vibration on the individual metal frameworks : 500Hz band, 1kHz band 2kHz band and 4kHz band. 2. The dynamics of the individual metal frameworks were as follows : Mode 1 was a rigid body mode in a vertical direction with a fulcrum of 54. Mode 2 was a horizontal rigid body mode with a fulcrum of 54. Mode 3 was a mixture of a horizontal rigid bode and horizontal bend mode. There was a rolling type mode observed only from the plate type. Mode 4 consisted mainly of a horizontal bend mode. This showed that there were differences among the various modes. 3. Judging from the displacement rate computed at the 500Hz band, the rate of displacement decreases as the thickness and ratio decrease. 4. Judging from linear damping quantity and damping quantity in terms of frequency, the finishing line showed a greater tendency toward resonance. 5. Analysis in terms of vibratory science using modal analysis and octave band analysis hinted at the significance of cross arch stabilization.
Practice　： Dentistry
Keywords　：