2010 Fiscal Year Final Research Report
Enhancement of water durability and bio-activity on electrically modified yttria-stabilized zirconia surfaces
Project/Area Number |
21760528
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Single-year Grants |
Research Field |
Inorganic materials/Physical properties
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Research Institution | Kyushu University |
Principal Investigator |
TANAKA Yumi Kyushu University, 大学院・工学研究院, 准教授 (00436619)
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Project Period (FY) |
2009 – 2010
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Keywords | イットリア安定化正方晶ジルコニア / バイオセラミックス / 酸化物イオン伝導 / 分極 / 低温劣化 / アルカリ処理 / 骨類似アパタイト |
Research Abstract |
Yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) is an important load-bearing bioceramic. However, a phenomenon called LTD, in which a phase destabilization occurs under moisture, reduces the reliability of Y-TZP as long-term implants. Since the exact mechanism of LTD is still unclear, this work was directed to evaluate an influence of surface charges of Y-TZP on LTD. Y-TZP were polarized under DC electrical field to vary surface O^<2-> concentrations, which resulted in a successful preparation of Y-TZP surfaces with stable static charges. LTD durability was significantly influenced by the polarity on the surfaces ; the negatively-charged surface was proved to show a good LTD durability.
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[Presentation] In Vitro Method to Characterize Resorption of Calcium Phosphate-Based Ceramic Scaffolds2009
Author(s)
A.Ito, Y.Sogo, A.Yamazaki, M.Aizawa, A.Osaka, S.Hayakawa, M.Kikuchi, I.Akahane, K.Yamashita, Y.Tanaka, M.Tadokoro, H.Ohgushi
Organizer
The 26^th International Japan-Korea Seminar on Ceramics
Place of Presentation
Ibaraki (Japan)
Year and Date
2009-11-25
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