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    Antibacterial Effects of Fluoride-Releasing Orthodontic Composites: A Pilot Study
    (Aves Press Ltd, 2011) Ozturk, Firat; Toy, Ebubekir; Arslan, Ugur; Hatunoglu, Erdem
    Aim: The purpose of this study was to evaluate the antibacterial effects of 3 different fluoride-releasing orthodontic composites using a direct contact test (DCT). Materials and Methods: The antibacterial properties of fluoride releasing orthodontic composites were evaluated with the DCT. For the DCT, wells (n=8) of 96-microtitre plates were coated with the tested bonding adhesives [Transbond Plus (3M Unitek, Monrovia, USA) Light Bond (Reliance Ortho Prod. Inc. Itasca, IL, USA) Kurasper F (Kuraray Medical Inc. Okayama, Japan)]. Kalzinol (Zinc-Oxide Eugenol Cement) (Dentsply, Konstanz, Germany was used as a positive control material. A Streptococcus mutans suspension was placed on the surface of each specimen for 1 hour at 37 degrees C. Bacterial growth was monitored for 16 hours with a temperature-controlled microplate spectrophotometer. The kinetics of the outgrowth in each well was recorded continuously at 650 nm every 30 minutes. The data were analyzed by one-way ANOVA, as well as by Tamhane's T2 multiple comparison test. The level of significance was determined as P < 0.05. Results: The evaluation of the results of the DCT revealed that there were statistically significant differences between the four groups (F=156,951, P=0.000). The control material (Kalzinol) showed complete inhibition of bacterial growth (mean 0.01 +/- 0.05). The multiple comparison test indicated that there were no significant difference in bacterial growth between Kalzinol and Transbond Plus (mean 0.12 +/- 0.17) (P=0.509).. Kurasper F (mean 0.73 +/- 0.06) and Light Bond (mean 0.85 +/- 0.02) showed statistically significant differences (P=0.000) compared to Kalzinol. Conclusion: Transbond Plus showed marked antibacterial effects.
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    Long-Term Antibacterial Effects of Different Orthodontic Cements
    (Aves, 2011) Ozturk, Firat; Yalcin, Muhammet; Arslan, Ugur; Nalcaci, Ruhi; Aksakalli, Sertac
    The purpose of this study was to evaluate the antibacterial properties of different orthodontic cements using a direct contact test (DCT). Materials and Methods: The antibacterial properties of 6 orthodontic cements were evaluated with DCT. For the DCT, wells (n=8) of 96-microtiter plates were coated with the tested cements (Durelon, Ketac-Cem Radiopaque, GC Fuji Ortho Band LC Paste Pak, Meron, Ultra Band Lok, and 3M Unitek Multi Cure). A Streptococcus mutans suspension was placed on the surface of each specimen for 1 hour at 37 degrees C. Bacterial growth was monitored for 16 hours with a temperature-controlled microplate spectropho-tometer. The kinetics of the outgrowth in each well was recorded continuously at 650 nm every 30 minutes. Additional experiments were performed in which the tested materials were aged for 1 week, 1 month and 3 months. The data were analyzed by one-way ANOVA, and Tamhane's T2 multiple comparison test. Results: The results of the DCT showed that, freshly mixed samples of 3M Multi Cure (P=0.02), GC Fuji Ortho (P=0.04), Meron (P=0.001), and Durelon (P=0.001) showed antibacterial activity. After aging for one week 3M Unitek Multi Cure (P=0.000), Durelon (P=0.03) still showed antibacterial activity. In the experiments with 1 month aged specimens, only Durelon (P=0.001) showed antibacterial activity. In the 3 months aged specimens, 3M Multi Cure (P=0.000), GC Fuji Ortho (P=0.001), and Durelon (P=0.001) showed antibacterial property. Conclusion: Within the limitations of this study, 3M Unitek Multi Cure, GC Fuji Ortho, and Durelon, showed antibacterial properties during study period.