Development of multifunctional nano-composite ceramics suitable for all-ceramic restorations

• Project/Area Number: 23592840
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Prosthetic dentistry
• Research Institution: Osaka University
• Principal Investigator: NAKAMURA Takashi 大阪大学, 歯学研究科(研究院), 准教授 (20198211)
• Co-Investigator(Kenkyū-buntansha): WAKABAYASHI Kazumichi 大阪大学, 歯学部附属病院, 助教 (50432547) ; SEKINO Tohru 東北大学, 多元物質科学研究所, 准教授 (20226658) ; YATANI Hirofumi 大阪大学, 大学院歯学研究科, 教授 (80174530)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2011: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: ジルコニア / ナノ複合化 / CAD/CAM / ポーラス / ２層構造 / クラウン / 適合 / 破壊抵抗 / ポーラスサーフェス / 多孔質体

Research Abstract

All-ceramic crowns and fixed partial dentures made with zirconia frames have excellent esthetics and biocompatibility, but there is some suggestion that they pose problems of fracturing and/or dislodgement of the veneering porcelain. The purpose of this study is to evaluate the workability of new hybrid zirconia and examine the fracture resistance of all-ceramic crowns using this hybrid zirconia frames.
Completed zirconia frames were veneered with tooth-colored porcelain. The marginal and internal gaps between frames/crowns and abutments were measured. Each crown specimen was subjected to a fracture test.
There were no significant differences in marginal and internal gap among all the frames and crowns. The crown with the hybrid zirconia frame had a 31-35% greater fracture load than that with the commercial or dense zirconia frame. This suggests that the all-ceramic crowns with a hybrid zirconia frame have a high fracture resistance.

Research Products

• [Journal Article] Shear bond strength of veneering porcelain to porous zirconia (2014)
  • Author(s): Nakamura, T., Sugano, T., Usami, H., Wakabayashi, K., Ohnishi H., Sekino, T. and Yatani H.
  • Journal Title: Dent Mater. J. Volume: 33 Pages: 220-225
  • NAID: 130003394960
• [Journal Article] Shear bond strength of veneering porcelain to porous zirconia. (2014)
  • Author(s): Nakamura, T, Sugano, T., Usami, H., Wakabayashi, K., Ohnishi H., Sekino, T., Yatani H.
  • Journal Title: Dental Materials Journal Volume: 33(2) Pages: 1-6
  • NAID: 130003394960
  • Peer Reviewed
• [Journal Article] Current status of zirconia restoration (2013)
  • Author(s): Miyazaki, T., Nakamura, T., Matsumura, H., Ban, S., and Kobayashi, T.
  • Journal Title: J. Prosthodont. Res. Volume: 57 Pages: 236-261
  • NAID: 130004953472
• [Journal Article] Current status of zirconia restoration (2013)
  • Author(s): Miyazaki, T., Nakamura, T., Matsumura, H., Ban, S., and Kobayashi, T.
  • Journal Title: Journal of Prosthodontic Research Volume: 57 Issue: 4 Pages: 236-261
  • DOI: 10.1016/j.jpor.2013.09.001
  • NAID: 130004953472
  • ISSN: 1883-1958, 1883-9207
  • Peer Reviewed
• [Journal Article] Effects of aging on surface texture of veneering ceramics for zirconia frameworks (2012)
  • Author(s): Tang, X., Tang, X., Nakamura, T., and Yatani H.
  • Journal Title: J. Dent. Volume: 40 Pages: 913-920
• [Journal Article] Effects of multiple firings on the mechanical properties and microstructure of veneering ceramics for zirconia frameworks (2012)
  • Author(s): Tang, X., Nakamura, T., Usami, H., Wakabayashi, K., and Yatani H.
  • Journal Title: J. Dent. Volume: 40 Pages: 372-380
• [Journal Article] The relationship between a new silica -doped zirconia and its resistance to low-temperature degradation (LTD) (2012)
  • Author(s): Nakamura, T., Usami, H., Ohnishi, H., Nishida, H., Tang, H., Wakabayashi, K., Sekino, T. and Yatani H.
  • Journal Title: Dent. Mater. J. Volume: 31 Pages: 106-112
• [Journal Article] Effects of multiple firings on the mechanical properties and microstructure of veneering ceramics for zirconia frameworks. (2012)
  • Author(s): Tang, X., Nakamura, T.*, Usami, H., Wakabayashi, K., and Yatani H.
  • Journal Title: J. Dent. Volume: 40 Issue: 5 Pages: 372-380
  • DOI: 10.1016/j.jdent.2012.01.014
  • Peer Reviewed
• [Journal Article] The relationship between milling a new silica-doped zirconia and its resistance to low-temperature degradation (LTD): a pilot study (2012)
  • Author(s): T.Nakamura, H.Usami, H.Ohnishi, H.Nishida, X.Tang, K.Wakabayashi, T.Sekino, H.Yatani
  • Journal Title: Dental Materials Journal Volume: 31 Issue: 1 Pages: 106-112
  • DOI: 10.4012/dmj.2011-048
  • NAID: 10030128418
  • ISSN: 0287-4547, 1881-1361
  • Peer Reviewed
• [Presentation] State of the art in dental ceramic materials (2013)
  • Author(s): Nakamura, T.
  • Organizer: 2^<nd> Foshan Academy of Esthetic Dentistry Meeting
  • Place of Presentation: Foshan, China
  • Year and Date: 2013-12-13
• [Presentation] ポーラス/緻密の二層構造を有するジルコニアフレームのオールセラミッククラウンへの応用 (2013)
  • Author(s): 中村隆志, 菅野剛, 関野徹, 大西宏司, 中博律, 若林一道, 宇佐美博文, 矢谷博文, 田中俊一郎
  • Organizer: 第13回東北大学多元物質科学研究所研究発表会
  • Place of Presentation: 仙台市, 宮城
  • Year and Date: 2013-12-06
• [Presentation] Dynamic fracture analysis of all-ceramic crowns by using high speed photography (2013)
  • Author(s): Wakabayashi, K., Nakamura, T., Yatani H.
  • Organizer: 8^<th> World Congress of International Federation of Esthetic Dentistry
  • Place of Presentation: Munich, Germany
• [Presentation] ポーラス/緻密の二層構造を有するジルコニアフレームのオールセラミッククラウンへの応用 (2013)
  • Author(s): 菅野剛, 中村隆志, 若林一道, 宇佐美博文, 矢谷博文
  • Organizer: 第24回日本歯科審美学会学術大会
  • Place of Presentation: 東京
• [Presentation] Dynamic fracture analysis of all-ceramic crowns by using high speed photography (2013)
  • Author(s): Nakamura, T., Wakabayashi, K., Usami, H. and Yatani H.
  • Organizer: American Academy of Cosmetic Dentistry 29^<th> Annual Meeting
  • Place of Presentation: Seattle, USA
• [Presentation] ポーラス構造を有するジルコニアセラミックスと陶材の焼付強度 (2013)
  • Author(s): 中村隆志, 菅野剛, 若林一道, 宇佐美博文, 矢谷博文
  • Organizer: 第4回日本歯科CAD/CAM学会学術大会
  • Place of Presentation: 東京都
• [Presentation] マイクロフォーカスX線CTを用いた審美修復装置の非破壊的および三次元的適合試験法の検討-第一報X線造影性を有する適合試験材の開発- (2013)
  • Author(s): 岡雄造, 若林一道, 宇佐美博文, 中村隆志, 矢谷博文
  • Organizer: 第4回日本歯科CAD/CAM学会学術大会
  • Place of Presentation: 東京都
• [Presentation] 審美修復歯冠装置の非破壊的適合試験法の検討-第一報X線造影性を有する適合試験材の試作- (2013)
  • Author(s): 岡雄造, 若林一道, 宇佐美博文, 中村隆志, 矢谷博文
  • Organizer: 平成24年度日本補綴歯科学会関西支部学術大会
  • Place of Presentation: 大津市, 滋賀県
• [Presentation] State of the art in dental ceramic materials (2013)
  • Author(s): Nakamura T
  • Organizer: 2nd Foshan Academy of Esthetic Dentistry Meeting
  • Place of Presentation: Foshan (China)
  • Invited
• [Presentation] ポーラス構造を有するジルコニアセラミックスと陶材の焼付強度 (2013)
  • Author(s): 中村隆志，菅野 剛，若林一道，宇佐美博文，矢谷博文
  • Organizer: 第4回日本歯科CAD/CAM学会学術大会
  • Place of Presentation: 東京
• [Presentation] ポーラス／緻密の二層構造を有するジルコニアフレームのオールセラミッククラウンへの応用 (2013)
  • Author(s): 菅野 剛，中村隆志，若林一道，宇佐美博文，矢谷博文
  • Organizer: 第24回日本歯科審美学会学術大会
  • Place of Presentation: 東京
• [Presentation] ポーラス構造を有するジルコニアセラミックスの機械的性質について (2012)
  • Author(s): 菅野剛, 中村隆志, 若林一道, 宇佐美博文, 大西宏司, 中博律, 矢谷博文
  • Organizer: 第22回日本歯科医学会総会
  • Place of Presentation: 大阪市, 大阪
• [Presentation] Contemporary ceramic materials for dental restoration (2012)
  • Author(s): Nakamura, T.
  • Organizer: 29^<th> International Korea-Japan Seminar on Ceramics
  • Place of Presentation: Daegu, Korea
• [Presentation] Bond strength between veneering porcelain and zirconia ceramics with porous surface (2012)
  • Author(s): Sugano, T., Nakamura, T., Wakabayashi, K., Usami, H., Okamoto, K., Yatani H.
  • Organizer: 12^<th> Biennial meeting of Asian Academy of Aesthetic Dentistry
  • Place of Presentation: Sapporo, Japan
• [Presentation] Contemporary ceramic materials for dental restoration. (2012)
  • Author(s): Nakamura, T.
  • Organizer: 29th International Korea-Japan Seminar on Ceramics.
  • Place of Presentation: Daegu, Korea.
  • Invited
• [Presentation] Bond strength between veneering porcelain and zirconia ceramics with porous surface. (2012)
  • Author(s): Sugano, T., Nakamura, T., Wakabayashi, K., Usami, H., Okamoto, K., Yatani H.
  • Organizer: 12th Biennial meeting of Asian Academy of Aesthetic Dentistry
  • Place of Presentation: Sapporo, Japan.
• [Presentation] ポーラス構造を有するジルコニアセラミックスの機械的性質について (2012)
  • Author(s): 菅野 剛，中村隆志，若林一道，宇佐美博文，大西宏司，中 博律，矢谷博文
  • Organizer: 第22回日本歯科医学会総会
  • Place of Presentation: 大阪市，大阪．
• [Presentation] Science and clinical aspects of current dental ceramic materials (2011)
  • Author(s): Takashi Nakamura
  • Organizer: 7th World Congress of International Federation of Esthetic Dentistry(招待講演)
  • Place of Presentation: Rio de Janeiro, Brazil
• [Book] CAD/CAMと歯冠修復技工, CAD/CAMデンタルテクノロジー (2012)
  • Author(s): 中村隆志, 宮前守寛(分担執筆)
  • Publisher: 医歯薬出版
• [Patent(Industrial Property Rights)] 歯科用ジルコニア質焼結体, クラウン及びブリッジ用フレーム (2014)
  • Inventor(s): 中村隆志, 菅野 剛, 若林一道, 矢 谷博文, 関野 徹, 中 博律, 大西宏司
  • Industrial Property Rights Holder: 大阪大学, 東北大学, 株式会社ニッ カトー
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2014-008068
  • Filing Date: 2014-01-20
• [Patent(Industrial Property Rights)] 歯科用ジルコニア質焼結体、クラウン用フレーム、ブリッジ用フレーム (2014)
  • Inventor(s): 大阪大学、ニッカトー、東北大学
  • Industrial Property Rights Holder: 大阪大学、ニッカトー、東北大学
  • Industrial Property Rights Type: 特許
  • Filing Date: 2014-01-20