| Project/Area Number |
19390489
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
補綴理工系歯学
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| Research Institution | Tohoku University |
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Principal Investigator |
TAMAZAWA Yoshinori Tohoku University, 病院, 准教授 (10124603)
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| Co-Investigator(Kenkyū-buntansha) |
TAMAZAWA Kaoru 東北大学, 病院, 講師 (00124602)
IWAMATSU Masaaki 東北大学, 病院, 助教 (30343031)
WATANABE Makoto 東北大学, 大学院・歯学研究科, 客員教授 (80091768)
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| Project Period (FY) |
2007 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
Fiscal Year 2010: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2009: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2008: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2007: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Keywords | 感染対策 / 歯科用ユニット / 給水管 / バイオフィルム / 細菌 / 着脱式タンク / 着脱式給水タンク |
|---|
| Research Abstract |
Water contamination from dental unit is a serious problem. So, we developed a dental unit installing a built-in removable water supply tank, without a water supply pipe to eliminate biofilm, the source of water contamination in the pipe. And, we grew common bacteria on standard agar medium at 36℃ for one days, and heterotrophic bacteria on R2A agar medium at 20℃ for 7 days, and measured bacterial numbers for water quality tests based on the conventional method. The results showed that the number of common bacteria from turbine, engine-handpiece and three-way syringe ranged between 30-50 CFU/ml and heterotrophic bacteria ranged between 30-1,500 CFU/ml, achieving the standard value of water quality ( common bacteria : 100 CFU/ml, heterotrophic bacteria : 2,000 CFU/ml) in Japan.
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