金チタン合金の機械的特性と焼付強さに関する研究 Mechanical Characteristics and Bond Strengths of Gold-Titanium Alloys to Porcelains

この論文にアクセスする

この論文をさがす

著者

    • 森川 理 MORIKAWA Osamu
    • 東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系専攻摂食機能保存学講座摂食機能保存学分野 Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
    • 大竹 貫洋 OTAKE Takehiro
    • 東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系専攻摂食機能保存学講座摂食機能保存学分野 Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
    • 埴 英郎 HANI Hideo
    • 東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系専攻摂食機能保存学講座摂食機能保存学分野 Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
    • 松村 光明 MATSUMURA Mitsuaki
    • 東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系専攻摂食機能保存学講座摂食機能保存学分野 Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
    • 三浦 宏之 MIURA Hiroyuki
    • 東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系専攻摂食機能保存学講座摂食機能保存学分野 Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
    • 高橋 英和 TAKAHASHI Hidekazu
    • 東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系専攻摂食機能保存学講座先端材料評価学分野 Advanced Biomaterials, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
    • 西村 文夫 NISHIMURA Fumio
    • 東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系専攻摂食機能保存学講座先端材料評価学分野 Advanced Biomaterials, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University

抄録

目的: 口腔内で使用する合金は生体適合性に優れ, 各種修復物に応用可能なものが望まれる. 最近, 耐食性に優れ, 生体適合性も良いとされる歯科用金チタン合金が市販された. そこで, この合金の機械的性質および陶材との焼付強さを測定し, その有用性を検討した.<BR>方法: 実験には市販の陶材焼付用金チタン合金を使用した. 各種鋳造試験片はメーカーの指示に従って鋳造, 熱処理を行い作製した. 機械的特性として引張特性, 硬さを, 熱的特性として熱膨張係数を測定した. 金チタン合金と従来型陶材, 超低溶陶材との焼付強さをDIN13927に準じて求めた. 対照として, 従来の陶材焼付用金合金と従来型陶材の焼付強さも求めた. 金チタン合金に従来型陶材を築盛し割断した試料をEPMA分析した.<BR>結果: 引張特性と硬さは熱処理により変化し, 軟化熱処理した値は有意に小さかった. 硬化熱処理ではタイプ4金合金に近い機械的性質を示した. 熱膨張係数は従来の陶材焼付用金合金よりも大きかった. 焼付強さはいずれの陶材を用いても40MPa以上を示し, 従来型陶材焼付用金合金の値とは有意な差を認めなかった. 剥離面を観察したところ金属側には陶材の成分が, 陶材側にはチタンが存在していた.割断面を観察したところ, 焼付界面直下に酸化チタンが認められた.<BR>結論: 今回検討した金チタン合金は, 単一合金で広範囲な修復が可能な機械的性質を有し, かつ十分な焼付強さを示したことからその有用性が示唆された.

Purpose: It is desirable to apply a multi-purpose alloy with good biocompatibility. A recently introduced gold-titanium alloy is reported to show good corrosion resistance and good biocompatibility. The purpose of this study was to evaluate the mechanical properties and the metal-fused-to-porcelain bond strengths of this alloy.<BR>Methods: A commercial gold-titanium alloy was selected. Cast specimens were prepared according to the manufacturer's instructions. The tensile test, the Vickers hardness test and the thermal expansion test were performed. The bond strengths of the gold-titanium alloy to a conventional porcelain and an ultra low-fusing porcelain for metal veneering were evaluated according to DIN 13 927. The bond strength of a conventional gold alloy to the conventional porcelain was also measured as a control. The sectioned specimen of the conventional porcelain fused to the goldtitanium alloy was analyzed with X-ray micro probe analysis.<BR>Results: Mechanical properties, such as Vickers hardness, tensile strength, yield strength and elastic modulus, were modified with heat treatment; the value of the mechanical properties after softening were significantly smaller than those after hardening and those of "as cast"; the properties after hardening nearly reached the classification of the ISO type 4 gold alloy. The coefficient of thermal expansion of this alloy was larger than that of the conventional gold alloy for porcelain. There were statistically no significant differences among bond strengths of three metal-porcelain combinations, all of which were above 40MPa. Elements of the porcelain and titanium were observed on the detached metal surface and the detached porcelain surface respectively. Particles of titanium oxide were observed at the interfacial layer on the sectioned specimens.<BR>Conclusions: This gold-titanium alloy could be applied to various restorations because of its sufficient mechanical properties and bond strengths with porcelain.

収録刊行物

  • 日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society

    日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society 46(2), 213-222, 2002-04-10

    Japan Prosthodontic Society

参考文献:  19件中 1-19件 を表示

被引用文献:  1件中 1-1件 を表示

各種コード

  • NII論文ID(NAID)
    10008156989
  • NII書誌ID(NCID)
    AN00197911
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03895386
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
ページトップへ