Development of nano-composite gradational translucent zirconia material without low-temperature degradation

• Project/Area Number: 26462917
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Prosthodontics/ Dental materials science and
• Research Institution: Osaka University
• Principal Investigator: Nakamura Takashi 大阪大学, 歯学研究科, 准教授 (20198211)
• Co-Investigator(Kenkyū-buntansha): 関野 徹 大阪大学, 産業科学研究所, 教授 (20226658) ; 若林 一道 大阪大学, 歯学部附属病院, 助教 (50432547) ; 矢谷 博文 大阪大学, 歯学研究科, 教授 (80174530)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: ジルコニア / CAD/CAM / シリカ / アルミナ / 透光性 / 低温劣化 / クラウン / 破壊荷重 / 加速劣化試験 / 曲げ強度 / 加速試験

Outline of Final Research Achievements

The purpose of this study was to examine the translucency and low-temperature degradation of silica-doped experimental Y-TZP (Yttria-stabilized tetragonal zirconia polycrystal) containing almost no alumina.
The experimental Y-TZP samples were sintered at different temperatures. The samples of commercially available translucent Y-TZP was used as controls. In addition, the specimens were also subjected to an accelerated aging test. The results showed that the experimental Y-TZP exhibited almost the same level of translucency as commercial translucent Y-TZP. It was concluded that the silica-doped Y-TZP will develop translucency and resistance to degradation.

Research Products

• [Journal Article] Translucency and low-temperature degradation of silica-doped zirconia: A pilot study (2016)
  • Author(s): Nakamura T, Nakano Y, Usami H, Wakabayashi K, Ohnishi H, Sekino T, Yatani H.
  • Journal Title: Dental Materials Journal Volume: 35 Issue: 4 Pages: 571-577
  • DOI: 10.4012/dmj.2015-274
  • NAID: 10025916604
  • ISSN: 0287-4547, 1881-1361
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Translucency and low-temperature degradation of silica-doped zirconia: a pilot study (2016)
  • Author(s): Nakamura, T., Nakano, Y., Usami, H., Wakabayashi, K., Ohnishi H., Sekino, T. and Yatani, H.
  • Journal Title: Dental Metarials Journal Volume: 35 Pages: 1-6
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Fitting accuracy and fracture resistance of crowns using a hybrid zirconia frame made of both porous and dense zirconia (2015)
  • Author(s): Nakamura, T., Sugano, T., Usami, H., Wakabayashi, K., Ohnishi H., Sekino, T. and Yatani H.
  • Journal Title: Dental Materials Journal Volume: 34 Issue: 2 Pages: 257-262
  • DOI: 10.4012/dmj.2014-145
  • NAID: 130005062408
  • ISSN: 0287-4547, 1881-1361
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Influence of multiple firings and aging on surface roughness, strength and hardness of veneering ceramics for zirconia frameworks (2015)
  • Author(s): Tang, X., Luo, H., Bai, Y., Tang, H., Nakamura, T., and Yatani, H.
  • Journal Title: Journal of Dentistry Volume: 43 Issue: 9 Pages: 1148-1153
  • DOI: 10.1016/j.jdent.2015.06.006
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Preparation of dental zirconia material with fluorescent color of natural teeth. (2017)
  • Author(s): Nishida, H., Nakamura, T., Cho, S.H., and Sekino, T
  • Organizer: The 18th International Symposium on Eco-material Processing and Design.
  • Place of Presentation: 沖縄県市町村自治会館(沖縄県那覇市)
  • Year and Date: 2017-02-17
  • Int'l Joint Research
• [Presentation] 支台歯およびセメントの色調がマルチレイヤー型ジルコニアの色調に及ぼす影響 (2016)
  • Author(s): 塩見祥子，若林一道，岡村真弥，中野芳郎，中村隆志，矢谷博文
  • Organizer: 平成28年度日本補綴歯科学会関西支部学術大会
  • Place of Presentation: あべのハルカス25階 会議室(大阪府大阪市)
  • Year and Date: 2016-10-29
• [Presentation] Current concepts of CAD/CAM metal-free crowns. (2016)
  • Author(s): Nakamura, T
  • Organizer: 2nd Annual Meeting of International Academy for Digital Medicine.
  • Place of Presentation: Busan, Korea.
  • Year and Date: 2016-09-03
  • Int'l Joint Research / Invited
• [Presentation] Evaluation of fluorescent characteristics of dental zirconia. (2016)
  • Author(s): Okamura, S., Nishida, H., Wakabayashi, K., Nakamura, T., Sekino, T., and Yatani, H
  • Organizer: 2nd Annual Meeting of International Academy for Digital Medicine.
  • Place of Presentation: Busan, Korea.
  • Year and Date: 2016-09-03
  • Int'l Joint Research
• [Presentation] Influence on phase constitution and fluorescence characteristics of zirconia by rare earth-activation. (2016)
  • Author(s): Nishida, H., Sekino, T., Okamura, S., Wakabayashi, K. and Nakamura, T.
  • Organizer: 2nd Annual Meeting of International Academy for Digital Medicine.
  • Place of Presentation: Busan, Korea.
  • Year and Date: 2016-09-03
  • Int'l Joint Research
• [Presentation] 希土類賦活によるジルコニアの蛍光特性および構成相への影響． (2016)
  • Author(s): 西田尚敬，関野 徹，岡村真弥，中村隆志，矢谷博文，山本一世
  • Organizer: 第27回日本歯科審美学会学術大会
  • Place of Presentation: 京王プラザホテル札幌(北海道札幌市)
  • Year and Date: 2016-08-27
• [Presentation] 低温劣化がシリカ添加高透光性ジルコニアの機械的特性に及ぼす影響 (2016)
  • Author(s): 中野芳郎，中村隆志，岡 雄造，宇佐美博文， 西田尚敬，若林一道，関野 徹，矢谷博文
  • Organizer: 第67回日本歯科理工学会学術講演会
  • Place of Presentation: 九州大学医学部百年講堂(福岡県福岡市)
  • Year and Date: 2016-04-16
• [Presentation] ツリウム添加イットリア系ジルコニアの発光特性． (2016)
  • Author(s): 岡村真弥，西田尚敬，中野芳郎，若林一道，中村隆志，関野 徹，矢谷博文
  • Organizer: 第67回日本歯科理工学会学術講演会
  • Place of Presentation: 九州大学医学部百年講堂(福岡県福岡市)
  • Year and Date: 2016-04-16
• [Presentation] Effects of the cement and abutment tooth color on the shade of multilayered zirconia. (2016)
  • Author(s): 7)Wakabayashi, K., Shiomi, S., Amo, K., Carbajal, J., Okamura, S., Nakano, Y., Nakamura, T., and Yatani, H
  • Organizer: Korean Academy of Esthetic Dentistry 2016 Fall Meeting
  • Place of Presentation: Seoul,Korea.
  • Int'l Joint Research
• [Presentation] 割れないCAD/CAM冠の条件 (2015)
  • Author(s): 中村隆志
  • Organizer: 第26回日本歯科審美学会学術大会
  • Place of Presentation: 東京歯科大学（東京都，千代田区）
  • Year and Date: 2015-11-22
  • Invited
• [Presentation] 歯冠補綴装置の三次元適合評価へのマイクロフォーカスＸ線ＣＴの応用 (2015)
  • Author(s): 岡 雄造，若林一道，中野芳郎，岡村真弥，天羽康介，塩見祥子，中村隆志，矢谷博文
  • Organizer: 第26回日本歯科審美学会学術大会
  • Place of Presentation: 東京歯科大学（東京都，千代田区）
  • Year and Date: 2015-11-22
• [Presentation] ミストCVD法によるジルコニア表面へのシリカ成膜 (2015)
  • Author(s): 岡村真弥，西田尚敬，中野芳郎，宇佐美博文，若林一道，中村隆志，矢谷博文
  • Organizer: 平成27年度日本補綴歯科学会関西支部学術大会
  • Place of Presentation: 兵庫医療大学（兵庫県，神戸市）
  • Year and Date: 2015-11-07
• [Presentation] ジルコニア系材料の歯科応用 (2015)
  • Author(s): 中村隆志
  • Organizer: 2015年バルクセラミックス若手セミナー，日本セラミックス協会エンジニアリング部会
  • Place of Presentation: グランドホテル六甲スカイヴィラ（兵庫県，神戸市）
  • Year and Date: 2015-09-22
  • Invited
• [Presentation] Translucency and aging resistance of silica-doped dental zirconia (2015)
  • Author(s): Nakano, Y., Nakamura, T., Wakabayashi, K., Yatani H
  • Organizer: 16th Biennial meeting of International College of Prosthodontics,
  • Place of Presentation: Seoul, Korea
  • Year and Date: 2015-09-17
  • Int'l Joint Research
• [Presentation] Current dental ceramics and their clinical applications (2014)
  • Author(s): Nakamura, T.
  • Organizer: 13th Biennial Meeting of Asian Academy of Aesthetic Dentistry
  • Place of Presentation: Foshan, China
  • Year and Date: 2014-12-04 – 2014-12-06
  • Invited
• [Presentation] 審美修復におけるOne Day Treatmentの現状について (2014)
  • Author(s): 中村隆志
  • Organizer: 第25回日本歯科審美学会学術大会 シンポジウム１
  • Place of Presentation: 高松市
  • Year and Date: 2014-11-22 – 2014-11-23
  • Invited
• [Presentation] シリカ添加ジルコニアの透光性 (2014)
  • Author(s): 中野芳郎，中村隆志，菅野 剛，宇佐美博文，若林一道，矢谷博文
  • Organizer: 第25回日本歯科審美学会学術大会
  • Place of Presentation: 高松市
  • Year and Date: 2014-11-22 – 2014-11-23