2015 Fiscal Year Final Research Report
Measurement of low-dose and long-time external exposure using human teeth.
| Project/Area Number |
26670898
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Social dentistry
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KINO Yasushi 東北大学, 理学研究科, 准教授 (00272005)
CHIBA Mirei 東北大学, 歯学研究科, 講師 (10236820)
SHIMIZU Yoshinaka 東北大学, 歯学研究科, 助教 (30302152)
SUZUKI Toshihiko 東北大学, 歯学研究科, 准教授 (70261518)
SHINODA Hisashi 東北大学, 歯学研究科, 名誉教授 (80014025)
OKA Toshitaka 東北大学, 高度教養教育・学生支援機構, 助教 (70339745)
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| Research Collaborator |
MIURA Tomisato 弘前大学, 保健学研究科, 准教授 (20261456)
KOARAI Kazuma 東北大学, 理学研究科, 大学院生
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | Electron spin resonance / External exposure / Teeth |
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| Outline of Final Research Achievements |
The Fukushima-Daiichi Nuclear Power Plant accident released a substantial amount of radioactive nuclides into the atmosphere and caused extensive contamination of the environment. In this study, we tried to measure external exposure in such environment using human teeth. Teeth samples were exposed for six months in polluted zones induced by the accident. It is well known that external exposure produce CO signals in teeth enamels and these signals remain in it for a long time. We assesed the CO signals by using electron spin resonance measurement. As a result, it was confirmed that teeth enamel samples exposed in the evacuated zone under about 160 mGy per year (18.3μGy/h) increased in CO signals. And, there was a fine correlation between actual measurement values by dosimeters and regression analysis values by the CO signals in the teeth enamel in this condition.
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| Free Research Field |
障害者歯科学
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