2007 Fiscal Year Final Research Report Summary
Electrophoretic deposition of Ce-TZP/Alumina nanocomposite for dental restorations
| Project/Area Number |
18592119
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
補綴理工系歯学
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| Research Institution | Osaka University |
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Principal Investigator |
NAKAMURA Takashi Osaka University, Graduate School of Dentistry, Associate Professor (20198211)
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| Co-Investigator(Kenkyū-buntansha) |
YATANI Hirofumi Osaka University, Graduate School of Dentistry, Professor (80174530)
SOHMURA Taiji Osaka University, Graduate School of Dentistry, Professor (10154692)
SEKINO Tohru Tohoku University, Institute of Multidisciplinary Research for Advanced Materials, Associate Professor (20226658)
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| Project Period (FY) |
2006 – 2007
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| Keywords | zirconia / alumina / nanocomposite / electrophoretic deposition / zeta potential / all-ceramic crown |
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| Research Abstract |
A composite made of nanometer-sized ceria-stabilized zirconia/alumina has recently been developed. It is reported that this new material is comparable in strength and toughness to metal, taking advantage of the characteristics of both zirconia and alumina.
At the same time, the electrophoretic deposition (EPD) method has become widely used for ceramic processing and this method would seem to make it possible to fabricate a dense, uniform framework even in a complicated shape. Therefore, if the aforementioned ceria-stabilized zirconia/alumina nanocomposite can be deposited successfully using the EPD method, an excellent framework would be fabricated more easily and completed in a shorter time.
The aim of this study was to evaluate the electrophoretic deposition (EPD) behavior of ceria-stabilized zirconia/alumina (Ce-TZP/Al_2O_3) granulated powder. Two types of slurry with a powder to solvent ratio of 10wt% and 20wt% were used. The zeta potential of the slurry was measured using the spectrometer at different pH levels. Then, EPD was performed to measure the weight of the deposited particles at varying pH levels, at two voltages (50V and 100V). The isoelectric point of the Ce-TZP/Al_2O_3 mixed powder was close to a pH of 8.5. If EPD was performed, the deposition of ceramic particles was observed in the range of pH3 to pH7 and the greatest deposition was found at around pH7. The deposition of ceramic particles was increased when the slurry concentration and voltage were high.
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[Journal Article] Analysis of internal defects in all-ceramic crowns using micro-focus X-ray computed tomography.2007
Author(s)
Nakamura, T., Wakabayashi, K.,Kawamura, Y, Kinuta, S., Mutobe, Y., Yatani, H.
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Journal Title
Dent. Mater. J. 26
Pages: 598-601
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Electrophoretic deposition behavior of ceria-stabilized zirconia/alumina powder.2007
Author(s)
Nakamura, T., Nishida, H., Sekino, T., Nawa, M., Wakabayashi, K, Kinuta, S., Mutobe, Y., Yatani, H.
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Journal Title
Dent. Mater. J. 26
Pages: 623-627
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Stress analysis of endodontically treated anterior teeth restored with different types of post material.2006
Author(s)
Nakamura, T., Ohyama, T., Waki, T., Kinuta, S., Wakabayashi, K., Mutobe, Y., Yatani, H.
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Journal Title
Dent. Mater. J. 25
Pages: 45-150
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Development of powder metallurgical ceria-stabilized ZrO_2/Al_2O_3 nanocomposite for electrophoretic deposition.2007
Author(s)
Nakamura, T, Nishida, H, Wakabayashi, K, Mutobe, Y, Akao, T, Yatani, H
Organizer
International Dental Materials Congress
Place of Presentation
Bangkok, Thailand
Year and Date
20071121-20071124
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Electrophoretic deposition behavior of Ce-TZP/Al_2O_3 powder.2007
Author(s)
Nakamura, T, Nishida, H, Wakabayashi, K, Mutobe, Y, Akao, T, Yatani, H
Organizer
World Congress of the International Federation of Esthetic Dentistry.
Place of Presentation
Seoul, Korea
Year and Date
20070504-20070506
Description
「研究成果報告書概要(欧文)」より
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