| Project/Area Number |
24540540
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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 |
Plasma science
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| Research Institution | Osaka City University |
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Principal Investigator |
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| Research Collaborator |
TAKAHASHI Kenji 金沢大学, 自然システム学系, 教授 (00216714)
TOCHIKUBO Fumiyoshi 首都大学東京, 大学院理工学研究科, 教授 (90244417)
MURAKAMI Tomoyuki 東京工業大学, 大学院総合理工学研究科, 助教 (20323818)
TANAKA Kenji 大阪市立大学, 大学院工学研究科, 助教 (20254386)
GOTO Tetsuo ライトタッチ研究会/ホワイトネット事務局, 代表
KANBAYASHI Hideo 医療法人けやき通り歯科, 理事長/院長
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | プラズマ / Er:YAGレーザ / 水 / 滅菌 / ラジカル / 化学反応 / 発光分光 / シミュレーション / レーザ / 液中 / キャビテーション / Ｅｒ：ＹＡＧ / 歯科 / 過酸化水素 / ＯＨラジカル / 医療 / マイクロプラズマ / 低侵襲 |
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| Outline of Final Research Achievements |
We have found that inactivation of the strepococcus mutans is possible by the treatment of a tooth using an Er:YAG laser and water, and that concentration of hydrogen peroxide increases by Er:YAG laser irradiation to water. Although we could not have definite evidences for proving generation of plasma in water by Er:YAG laser, we have clarified that OH radicals are generated through a dissociative recombination of hydronium ions and low energy electrons even after excitation period according to the results of our numerical simulation of gas-phase plasma reactions including water vapor.
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