| Project/Area Number |
14370649
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 | Aichi-Gakuin University |
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Principal Investigator |
TANAKA Yoshinobu Aichi-Gakuin University, dentistry, professor, 歯学部, 教授 (60014271)
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| Co-Investigator(Kenkyū-buntansha) |
HOSHIAI Kazumoto Aichi-Gakuin University, dentistry, assistant professor, 歯学部, 助教授 (10097610)
KANAZAWA Takeshi Aichi-Gakuin University, dentistry, lecturer, 歯学部, 講師 (10261017)
NAKAMURA Yoshinori Aichi-Gakuin University, dentistry, lecturer, 歯学部, 講師 (70308782)
TUDA Kenji Aichi-Gakuin University, dentistry, assistant, 歯学部, 助手 (20319198)
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| Project Period (FY) |
2002 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥13,700,000 (Direct Cost: ¥13,700,000)
Fiscal Year 2005: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2004: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2003: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2002: ¥8,900,000 (Direct Cost: ¥8,900,000)
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| Keywords | Powder metallurgy / Doctor blade / Ti sheet / Porous material / Spherical powder / Sintering |
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| Research Abstract |
Purpose
Powder metallurgy is a metal processing technology. The porous titanium produced from powder is widely used. It is applied to titanium, which is not easy to cast as it sinters under melting point. When it was used in prosthetic dentistry, application to high fusing metal that is biocompatible becomes possible. Then, the examination of mechanical characters of the Ti sheet produced by sintering was carried out and the application to dental prosthesis manufacture were discussed.
Method
Ti sheets of 1mm thickness which were added the binder to the spherical Ti powder was produced with the doctor blade method. The sintering was carried out between 900〜1150℃ at 6 kinds of temperatures. The sintered compact was evaluated by dimensional change rate, hardness test, bending strength, tensile strength and SEM observation. Another compact was sintered on the refractory cast.
Results and Conclusion
Mechanical strengths significantly increased with the sintering temperature. In addition, excellent mechanical strengths was acquired by adding crushed powder and de-binder process. And, in the sintering on the refractory cast, pre-baking over 100 minutes and sintering over 1050℃ was needed for practical application. It seemed possible to apply the sintered titanium to dental prosthesis. However, it will be necessary to examine the control of the shrinkage of the sintered compact in the future too.
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