Pelin, Uras Aydın (2011) Investigating the effect of the concentration of Fluoride on the reproduction of S. Mutans. Other thesis, TED ANKARA COLLEGE FOUNDATION HIGH SCHOOL.
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Abstract
The bacterium S. Mutans is known as the bacterium which is one of the reasons of the cavities in humans mouth. It basically combines with sugar and this makes the bacterium to adhere onto the teeth and after this the cavities begin to occur. To prevent the cavities, there is a substance called fluoride. Almost every toothpaste includes this substance and it fights against the S. Mutans by combining the inhibitor part to the bacterium. Some experiments have been done showing the effect of the concentration of the fluoride on S. Mutans. However there isn’t enough experiment which shows the exact effect of the concentration of the fluoride on the reproduction of S. Mutans. As a result the research question of this study is; how does the amount of fluoride effect the reproduction of S. Mutans on the teeth surface? Throughout the experiment it was found that when the concentration of the fluoride was increased the concentration of the bacteria was decreased. The greatest concentration of the bacteria was observed when there is no fluoride concentration in petri dishes, it was 0,527 od±0,005. In addition to that the lowest concentration of S. Mutans was observed when the fluoride concentration was the greatest (2000±0,5 ppm), the mean concentration of the bacteria was 0,173 od±0,005 which is the lowest concentration in the experiment. In addition to that a decrease was observed in the concentration of the bacteria when the fluoride concentration was increased, which shows the experiment is suitable with the hypothesis. On the other hand the results of the annova test also shows that the experiment is meaningfull with a p value which is smaller that 0.05. The result of the experiment shows that the fluoride has an effect on the reproduction of the bacteria and the regression in the decrease of the bacteria is directly proportional with the concentration of the fluoride.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | Supervisor: Fuat Şişman IB Notu: C |
| Uncontrolled Keywords: | bacterium, biology, fluoride, S. Mutans |
| Subjects: | Q Science > QH Natural history > QH301 Biology |
| Depositing User: | Kamil Çömlekçi |
| Date Deposited: | 22 Jun 2011 07:04 |
| Last Modified: | 12 Apr 2019 10:50 |
| URI: | http://tedprints.tedankara.k12.tr/id/eprint/158 |
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