2013 Fiscal Year Final Research Report
Development of multifunctional nano-composite ceramics suitable for all-ceramic restorations
| Project/Area Number |
23592840
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Prosthetic dentistry
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| Research Institution | Osaka University |
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Principal Investigator |
NAKAMURA Takashi 大阪大学, 歯学研究科(研究院), 准教授 (20198211)
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| 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)
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| Project Period (FY) |
2011 – 2013
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| Keywords | ジルコニア / ナノ複合化 / CAD/CAM |
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| 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.
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Research Products
(18 results)
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[Journal Article] Shear bond strength of veneering porcelain to porous zirconia2014
Author(s)
Nakamura, T., Sugano, T., Usami, H., Wakabayashi, K., Ohnishi H., Sekino, T. and Yatani H.
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Journal Title
Dent Mater. J.
Volume: 33
Pages: 220-225
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[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.
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Journal Title
Dent. Mater. J.
Volume: 31
Pages: 106-112
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[Presentation] Bond strength between veneering porcelain and zirconia ceramics with porous surface2012
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
Year and Date
20120719-22
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