| Project/Area Number |
09672025
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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 |
補綴理工系歯学
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| Research Institution | Aichi-gakuin university |
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Principal Investigator |
MURAKAMI Hiroshi Aichi-gakuin university, School of dentistry, Assistant Professor, 歯学部, 講師 (50182100)
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| Co-Investigator(Kenkyū-buntansha) |
SAKUMA Shigemitsu Aichi-gakuin university, School of dentistry, Assistant Professor, 歯学部, 講師 (80271386)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1998: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1997: ¥800,000 (Direct Cost: ¥800,000)
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| Keywords | Ozone / Disinfectant / Deodorization / Bedridden persons / Elderly persons / Dentures / Health care / Candida albicans |
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| Research Abstract |
The purpose of this research was to look into the possibility of furthering the health care and supervision of dentures worn by the bedridden elderly.
We set out to investigate the disinfectant effect of ozone on Candida albicans (C.albicans), the main constituent bacterium of dental plaque. In addition we used on organoleptic test to establish the extent of deodorization.
In 1997, we assembled the necessary laboratory equipment to investigate the disinfectant properties of ozone with regard to C.albicans. A high voltage battery and an airpump were attached in tandem to the ozone generator which in turn was connected to a foam, or bubble, generator by means of a silicon tube. This latter generator was suspended with the lower end in water contained in a laboratory beaker. Air was pumped into the ozone generator and the ozonized air arising from the high voltage discharge passed into the water container by way of the ozone generator. The relationship between the generated ozone concentration and the voltage was confirmedby means of an ozone densitometer. The ozone concentration was set at three levels.
The results showed that it took 25 minutes for the number of bacteria to decline to approximately 10^3 CFU/ml from 10^1 CFU/ml at an ozone concentration of 23 ppm, 20 minutes at 41 ppm and 15 minutes at 49 ppm.
In 1998, the deodorant effect of ozone on denture odor was also investigated.
It turned out that the odor of dentures subjected to scrutiny had completely dissipated within 10 minutes.
To sum up, cleaning dentures by means of ozone was shown to be an appropriate means of providing for the hygienic care of the dentures of thebedridden elderly.
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