The method to improve the fracture strength of all-ceramic crowns made of zirconia coping.

• Project/Area Number: 23592872
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Prosthetic dentistry
• Research Institution: The Nippon Dental University
• Principal Investigator: GOTO Shin-ichi 日本歯科大学, 新潟生命歯学部, 准教授 (10105504)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2013: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000); Fiscal Year 2012: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000); Fiscal Year 2011: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: ジルコニア / CAD/CAM / コアの形態 / オールセラミッククラウン / 応力負荷試験 / 剪断焼付強さ / チッピング / コーピング / 前装陶材 / 結合強さ / 表面処理 / 剪断試験 / 焼付強さ

Outline of Final Research Achievements

The method to improve the strength of all ceramic crown was examined in this study. The fracture force increased with the increase of the thickness of a zirconia copoing and the area of zirconia support. Furthermore treatment with some chemical spreading on half sintered zirconia improved the bond strength between zirconia coping and porcelain veneer significantly. The highest bond strength was observed using Indium tin oxide among them. Treatment with Indium tin oxide in 1mM concentration was improved the bond strength in comparison with treated nothing (Control). It was suggested that the fracture strength of all ceramic crowns improved moreover by these results of our research.

Research Products

• [Presentation] オールセラミッククラウンの強さに及ぼすジルコニアコーピングの形態と薬剤塗布の影響 (2014)
  • Author(s): 後藤真一、丸山完、小出（風間）未来、宮川行男
  • Organizer: 一般社団法人日本歯科理工学会
  • Place of Presentation: アステールプラザ
  • Year and Date: 2014-10-04 – 2014-10-05
• [Presentation] プライマー修理したジルコニアと前装陶材の焼付界面のEPMA分析 (2014)
  • Author(s): 小出（風間）未来、後藤真一、宮川行男
  • Organizer: 一般社団法人日本歯科理工学会
  • Place of Presentation: アステールプラザ
  • Year and Date: 2014-10-04 – 2014-10-05
• [Presentation] ジルコニアと前装陶材の焼付強さに及ぼす薬剤濃度の影響 (2014)
  • Author(s): 後藤真一、宮川行男
  • Organizer: 一般社団法人日本歯科理工学会
  • Place of Presentation: タワーホール船堀
  • Year and Date: 2014-04-12 – 2014-04-13
• [Presentation] ジルコニアと前装陶材の焼付強さ (2013)
  • Author(s): 後藤真一、赫多 清、宮川行男
  • Organizer: 日本歯科理工学会
  • Place of Presentation: 日本歯科大学新潟生命歯学部
• [Presentation] オールセラミックスクラウンの強さに及ぼすジルコニアコーピングの厚さとサポート形態の影響 (2012)
  • Author(s): 後藤真一
  • Organizer: 一般社団法人日本歯科理工学会
  • Place of Presentation: 福岡市東区九州大学