| Project/Area Number |
19592363
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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 |
Orthodontic/Pediatric dentistry
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| Research Institution | Health Sciences University of Hokkaido |
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Principal Investigator |
IIJIMA Masahiro Health Sciences University of Hokkaido, 歯学部, 准教授 (20305915)
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| Co-Investigator(Kenkyū-buntansha) |
MIZOGUCHI Itaru 北海道医療大学, 歯学部, 教授 (20200032)
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| Research Collaborator |
BRANTLEY William A. Ohio State University
LIN Chun-pin National Taiwan University
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | イオン注入 / 矯正装置 / 耐食性 / Ni-Tiワイヤー / 腐食試験 / アノード分極曲線 / フッ化物溶液 / X線光電子分光法 |
|---|
| Research Abstract |
The purposes of this study were to investigate the corrosion properties and the surface structure of ion implanted nickel-titanium orthodontic wire. Ion implanted nickel-titanium wire and Non ion implanted nickel-titanium wire were used for a potentiodynamic polarization measurement and X-ray photoelectron spectroscopy (XPS). Ion implanted wire in artificial saliva and mouthrinse with neutral pH had a lower current density than non ion implanted wire. Both wires in mouthrinse with low pH showed similar corrosion properties. XPS results suggested that a TiN layer may be present on the top surface. Plasma immersion ion implantation might increase the corrosion resistance of nickel-titanium wire in a neutral environment because of a protective TiN layer on the top surface.
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