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機能性球状粉体を補強材とする歯科用修復材料の創製

使用功能性球形粉末作为增强材料创建牙科修复材料

基本信息

批准号：
09877371
负责人：
近藤清一郎
金额：
$ 1.22万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Exploratory Research
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

中空形総状粉体は中実形球状粉体に比べて,軽量化,耐衝撃性,熱膨張性,薬剤の充填,硬化収縮・熱収縮・残留応力の軽減などの機能を付与する利点がある.中空形球状粉体の中で,Expancel 641DE(日本フェライト)は比較的低温の水の沸点近傍で熱膨脹性を有する.この温度は加熱重合型床用レジンの加熱温度あるいは重合熱の発生によって到達する温度である.本研究は加熱重合型床用レジンの粉剤へExpance 1641DEを配合して,成形・硬化過程における硬化収縮,熱収縮を補償し,成形・硬化過程の残留応力を軽減することによって,有床義歯の成形精度および適合性の向上を図ることにある.本目的を達成するために,次の観点から加熱重合型床用レジンの粉剤へのExpance 1641DEの効果を解明した.1. Expance 1641DEの配合が加熱重合型床用レジンの力学的性質に及ぼす影響その無添加の加熱重合型床用レジンに比べて,曲げ強さおよび曲げたわみは粉剤への添加量20%,曲げ弾性係数および曲げ剛性は15%,破壊靭性値は5%を最大値として有意に低下した.2. Expance 1641DEの配合が加熱重合型床用レジンの成形精度,適合性に及ぼす影響板状試験片(標点開距離50mm)および鞍形試験片による成形精度,適合性はその無添加の加熱重合型床用レジンに比べて,向上したことが確認された.しかし,Expance 1641DEは粉体相互の凝集性が高く,如何に床用レジン中に均一に分散するかの問題が未解決である.3. Expance 1641DEの配合が加熱重合型床用レジンの残留応力に及ぼす影響ひずみゲージ・リング埋め込み法(越智ら,高分子論文45,817,1988)によって成形・硬化過程の内部応力および成形・硬化後の残留応力の計測を試みたが,ひずみゲージの加熱時の温度補償問題が解決できなかった.

Hollow spheroidal powder in the middle shape of the powder is better than that of the hollow spherical powder, quantified, resistant, dilatant, dilatant, filled, hardened and hardened. The residual strength of the hollow powder is higher than that of the hollow powder. The low temperature boiling point of hollow spherical powder "Zhong" and "Expancel 641DE" is close to the boiling point of water, and the swelling property is weak. The temperature of the coincident bed is not equal to the temperature of the coincident bed. In this study, the process of forming hardening, the process of forming hardening, the residual force in the process of forming hardening, the residual force in the process of forming hardening, the accuracy of forming, the accuracy of forming and the accuracy of forming. In this study, the process of forming hardening in the process of forming hardening, the residual force in the process of forming hardening, the residual force in the process of forming hardening, the accuracy of forming, the accuracy of forming and the accuracy of forming. The purpose of this paper is to increase the accuracy of the coincident bed by using the powder powder and the Expance 1641DE powder. 1. The mechanical properties and mechanical properties of the Expance 1641DE coincident bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties of the superimposed bed, the mechanical properties The forming accuracy of the plate shape sheet (50mm), the forming accuracy of the saddle shape sheet (50mm), the forming accuracy of the saddle shape sheet, the accuracy of the forming accuracy, the accuracy, the accuracy. The powder of Expance 1641DE powder is highly agglutinative to each other, so how to disperse the powder uniformly and uniformly in the bed? Expance 1641DE is used in combination with the superimposed bed to use the residual force and the temperature of the coalesced bed to form and harden the process of forming and hardening. In the process of forming and hardening, the residual force after forming is calculated, and the temperature problem is solved.