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Journal of Dentistry, Shiraz University of Medical Sciences، جلد ۱۱، شماره Supplement Winter ۲۰۱۱، صفحات ۴۰-۴۶
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عنوان انگلیسی Detection and Quantification of Bacterial Flora in Dental Unit Water Systems and the Effect of Flushing on its Reduction
چکیده انگلیسی مقاله Statement of Problem: The origin of Dental Unit Water Lines (DUWL) contamination is specially related to the formation of biofilm which is com­posed of microorganisms within water and is located on the tubing lines. Purpose: In this descriptive study, we evaluated the degree of contamina­tion with Gram positive and Gram negative bacteria in DUWLs of the dent-al school and also determined the efficacy of flushing on reducing its micro­bial count.Materials and Methods: Thirty dental units from all the departments of de­ntal school in Tehran University of Medical Sciences were selected for this study. Sampling consisted of a two step procedure before and after one min­ute of flushing. The samples were taken from air/water line of each selected dental unit separately. Air/water syringe of each unit was completely disinf­ected with Deconex before sampling.Results: The range of the contamination varied from190 to 23 ×105 CFU/ml. The bacterial contamination included anaerobic Gram negative bacilli, non-fermenting Gram negative bacteria, Gram positive cocci and Gram positive bacilli. In all the samples taken from water taps, contamination was noted, varying from 25 to 1700 CFU/ml. This was significantly lower than the co­ntamination of air/water syringe of the dental units.Conclusion: Applying the right principles for infection control such as using disinfectants or sterile water in dental settings and daily flushing before visit­ing patients can be of great significance.KEY WORDS: Dental unit; Water line; Bacterial contamination; Flushing
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نویسندگان مقاله A. Mansourian |
c Dept. of Oral Medicine, School of Dentistry, Qazvin University of Medical Sciences, Qazvin, Iran d Dentist

J. Momen Beitollahi |
Dept. of Oral Medicine, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran

f Jabalameli |
Dept, of Microbiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran

Z. Tohidast akrad |
Dept. of Oral Medicine, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran

S. Basir Shabestari |
Dept. of Oral Medicine, School of Dentistry, Qazvin University of Medical Sciences, Qazvin, Iran

A. Khorshidian |
Dentist

Z. Bahmei |
Dentist

نشانی اینترنتی http://dentjods.sums.ac.ir/article_43595_4b3af5b6de1c8021ab85eb301bda84ad.pdf
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