Stress-strain response under spherical nanoindentation of tooth enamel
Project/Area Number |
25861808
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Conservative dentistry
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Research Institution | Showa University |
Principal Investigator |
OGINO REINA 昭和大学, 歯学部, 助教 (80585779)
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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 |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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Keywords | エナメル質 / 物性 / 応力ひずみ曲線 / オフィスホワイトニング / ナノインデンテーション / エナメル小柱 / 球状圧子 |
Outline of Final Research Achievements |
The aim of this study was to investigate the mechanical properties of bleached enamel and obtain stress-strain curves using spherical nanoindentation. Based on the hierarchical structure, nanoscale analysis is critical for the measurement of enamel crystals mechanical property. The stress-strain curves were obtained for the conical indenters for fused quartz and untreated enamel. The continuous stress-strain curves were measurable for untreated and in-office bleached (35 % hydrogen peroxide with halogen lamp irradiation 3 minutes x 3 times ; OB) enamel. The yield force was observed clearly in enamel stress-strain curves. The analysis of data obtained from partial unloading method with conical indenter tip revealed the stress-strain response by nanoindentation of enamel crystals without the effect of enamel sheath protein so that nanoscale mechanical properties on enamels with or without OB were comparable at material level.
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Report
(4 results)
Research Products
(9 results)
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[Journal Article] Nanomechanical properties and molecular structures of in vitro mineralized tissues on anodically oxidized titanium surfaces.2014
Author(s)
Jang, I-. K., Tanaka, R., Wurihan, Suzuki, D., Shibata Y., Fujisawa, N., Tanimoto, Y., Ogura, K., Kamijo, R., Miyazaki, T.
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Journal Title
Nanomedicine
Volume: 10
Issue: 3
Pages: 629-637
DOI
Related Report
Peer Reviewed
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