| Project/Area Number |
25463034
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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 |
Prosthodontics/ Dental materials science and
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| Research Institution | The Nippon Dental University College at Tokyo (2014-2015)
The Nippon Dental University (2013) |
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Principal Investigator |
KOIKE Mari 日本歯科大学東京短期大学, その他部局等, 教授 (00234667)
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| Co-Investigator(Kenkyū-buntansha) |
GAKUSHIN HANAKO 日本歯科大学, 生命歯学部, 教授 (50226114)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 歯科用金属アレルギー / 歯科用合金 / 金属成分分析 / 歯科用ポイント / 切削用ポイント |
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| Outline of Final Research Achievements |
Dental restorations are commonly made of metals or alloys. Allergic reactions caused by dental restorations have increasingly been reported for various types of alloys. Metallic elements that are often used in dental alloys include: precious metals, cobalt, chromium, molybdenum and precious metals and also some minor alloying elements such as gallium, silicone, niobium, tantalum, tungsten, etc. Sometimes, one or more of these elements act as an allergen. Therefore, it is imperative to identify which element(s) in a restoration causes the reaction. It would be beneficial to patients if one could know which elements are included in their restorations without destruction. Our study showed that a non-destructive sampling method using specially developed abrasive devices were suitable for the chemical analysis of the metal samples retrieved on the surfaces of the device. In addition, the osmium coating to the samples were beneficial for the elemental analysis.
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