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アブストラクト（24巻4号：神奈川歯学）
Japanese
| Title ： | 人工歯の材質差が総義歯の動態に及ぼす影響について |
|---|---|
| Subtitle ： | 原著 |
| Authors ： | 黒川元次郎, 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 ： | 4 |
| Page ： | 581-600 |
| Year/Month ： | 1990 / 3 |
| Article ： | 原著 |
| Publisher ： | 神奈川歯科大学学会 |
| Abstract ： | 「I. 緒言」 総義歯の安定に大きく関与する機能時の義歯の動態や変形を求めた報告には, X線映画法, X線規格写真法, 加速度ピックアップ法, MKG法等を用いたものが多い. この内前2者では, えられた結果は定性的には良好であるが, 定量的には漠然とした結果しかえられず, 後者の加速度ピックアップ法やMKG法では, センサを義歯に直接設置する方法のため, センサ自身の重量等の影響によって義歯の安定が阻害される恐れがある. さらに歪み計を用いた方法もあるが, 静的荷重下での義歯の変形観察にとどまる事が多く, また, 最近の有限要素法は有効な手段ではあるが, 与えるパラメータの適否によっては解析の信頼性に問題がある場合もある. そこで著者は, 松尾ら, 白沢が歯科界に導入した, 測定物そのものを対象とした振動解析が可能な, かつ, アニメーションとしてその動態を観察できるモーダル解析法を用いて総義歯の動態を把握する事とした. |
| Practice ： | 歯科学 |
| Keywords ： | モーダル解析, 総義歯, 人工歯 |
English
| Title ： | Influence on the Movement of a Complete Denture Caused by Differences in Artificial Tooth Materials |
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| Subtitle ： | |
| Authors ： | Motojiro KUROKAWA, Etsuro Matsuo |
| Authors（kana） ： | |
| Organization ： | The 1st Department of Prosthetic Dentistry, Kanagawa Dental College |
| Journal ： | Kanagawa Shigaku |
| Volume ： | 24 |
| Number ： | 4 |
| Page ： | 581-600 |
| Year/Month ： | 1990 / 3 |
| Article ： | Original article |
| Publisher ： | Kanagawa Odontological Society |
| Abstract ： | [Abstract]: An experiment using modal analysis was used to ascertain the activity of complete dentures and artificial teeth. Three types of artifitial teeth were used : a porcelain tooth, a resin tooth and a hard resin tooth. Animation and displacement values were used as criteria in determining the influence that differences in tooth materials had on the activity of the complete denture. The experiment was conducted to act as an aid in denture design and the following results were obtained : 1. The resonance frequency for the different test materials ranged from mode 4 to mode 7. 2. Regarding displacement value, a value of 1 μm or more was obtained in the 1 octave bandwidth for the 250 Hz band, 500 Hz band and the 1 kHz band. Among these, maximum displacement for the upper complete denture war as follows : When a porcelain tooth was used and a vibration of 1 for mode 1 (197 Hz) was applied, the value for the └3 cusp tip was 39.48 μm and that for the labial denture border side was 43.35 μm. As for the lower complete denture, when a porcelain tooth was used and ┌5 oscillation was applied for mode 1 (309 Hz), the value for the ┌3. cusp tip was 68.38 μm and that for the rear part of the denture border was 139.2 μm. 3. Regarding the activity of the complete denture in the 250 Hz and 1 kHz bands, when a porcelain tooth was used, a curve mode was observed for the opper complete denture in the labiolingual direction with the cervical line as the border. When the resin tooth and hard resin tooth were used, it was difficult to recognize any change with the cervical line as the border. It was also difficult to recognize a change at the ceryical section for the lower complete denture. 4. As for the 500 Hz band, when a porcelain tooth and a resin tooth were used, there were frequencies (300 Hz - 400 Hz) at which twisting in a labiolingual direction at the cervical section was recognized for the upper complete denture as well as frequencies (400 Hz - 600 Hz) where this was not recognized. A rigid body mode was recognized when the hard resin tooth was used. In addition, differences in the location for applying for vibration had an influence on the activity of the lower complete denture. |
| Practice ： | Dentistry |
| Keywords ： |
