| Project/Area Number |
20592262
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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 |
Prosthetic dentistry
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| Research Institution | Osaka University |
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Principal Investigator |
NAKAMURA Takashi Osaka University, 大学院・歯学研究科, 准教授 (20198211)
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| Co-Investigator(Kenkyū-buntansha) |
WAKABAYASHI Kazumichi 大阪大学, 臨床医工学融合研究教育センター, 特任講師 (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)
SOUMURA Taiji 大阪大学, 大学院・歯学研究科, 教授 (10154692)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 歯科補綴学一般 / セラミックス / ジルコニア / シリカ / ナノコンポジット / 強度 / 破壊靭性 / 低温劣化 / 加速試験 / 破壊靱性 / アルミナ / 硬度 |
|---|
| Research Abstract |
The aim of this study was to compare the degradation of a new silica doped Y-TZP material with that of conventional Y-TZP by using accelerated aging tests. The results of the accelerated tests revealed that after 50 hours of aging, the conventional Y-TZP samples had damaged surfaces that were weakened by 50 to 60%, while the silica-doped Y-TZP samples were only weakened by less than 20%. The monoclinic content of the conventional Y-TZP samples increased substantially to 62.7%, however, that of silica-doped Y-TZP samples was 18.9% after 5 hours of aging.
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