The objective of the present study was to investigate reduction in the colonization and growth of heterotrophic bacteria in dental unit waterlines by using hydrogen peroxide/colloidal silver as disinfectant. Twenty-seven dental units were included; 6 units that were more than 20 years old and 7 units that had been in use for 2 years comprised the old and new treatment groups, respectively. Fourteen units served as controls. The treatment groups were disinfected continuously and every 4 weeks shock doses were applied over a 20-week period. Water samples were taken before treatment, 1 and 2 weeks after treatment, and thereafter every 4 weeks; then they were inoculated onto R2A agar plates. While 1-16-week results for the old treatment group showed total heterotrophic bacterial counts of higher than 1 × 10^5 cfu/mL, at 20 weeks they were below 7.5 × 10^2 cfu/mL. Only 2 units were able to reach levels of Keywords: Biofilm, aerobic heterotrophic bacterial count, dental unit waterlines, hydrogen peroxide/colloidal silver
Biofilm, aerobic heterotrophic bacterial count, dental unit waterlines, hydrogen peroxide/colloidal silver
ÖZALP, MERAL; BULUT, ÖMER ENGİN; ATAÇ, ATİLLA STEPHAN; EKİZOĞLU, MELİKE; KART, DİDEM; ÇELİK, HAKAN HAMDİ; and TATAR, İLKAN
"The effect of hydrogen peroxide/colloidal silver on reducing the colonization and growth of heterotrophic bacteria in dental unit waterlines,"
Turkish Journal of Biology: Vol. 37:
3, Article 12.
Available at: https://journals.tubitak.gov.tr/biology/vol37/iss3/12