Browsing by Author "Pamir, T"

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    Fluoride release from esthetic restorative materials with and without adhesive
    Pamir, T; Tezel, H; Özata, F; Çelik, A
    Objective: The purpose of this in vitro study was to compare the effect of surface coating containing fluoride on patterns and amounts of fluoride release from 5 esthetic restorative materials. Method and materials: Twelve cylinders of each material were prepared in a plexiglass mold. The experimental groups (n = 6) were coated with 1 layer of fluoridated adhesive resin, Prompt L-Pop, while the control groups (n = 6) remained uncoated. Fluoride release into deionized water was measured on days 1, 2, 3, 7, 14, 21, and 28 using an ion analyzer. Results were evaluated statistically using repeated measure analysis of variance and Duncan test. Results: In the uncoated materials, the highest fluoride-releasing material was a resin composite Ariston pHc (140.468 +/- 9.80) followed by Photac-fil (101.200 +/- 5.56), Ketac-fil (91.098 +/- 4.69), Hytac Aplitip (5.122 +/- 1.00), and Ecusit (0.310 +/- 0.18). Material-coating interaction was found to be significant, but the effect of surface coating was different for each material. Among the coated materials, conventional glass-ionomer cement Ketac-fil released the highest amount of fluoride (93.326 +/- 10.86), followed by Photac-fil (83.666 +/- 4.72), Ariston pHc (53.862 +/- 7.90), Hytac Aplitip (14.634 +/- 2.35), and Ecusit (1.355 +/- 0.29). Conclusion: Application of fluoridated adhesive affected fluoride release from each material in varying magnitudes.
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    Mechanical and fluoride release properties of titanium tetrafluoride-added glass-ionomer cement
    Pamir, T; Sen, BH; Celik, A
    The aim of this study was to determine the fluoride-release and mechanical properties of a water-hardening glass-ionomer cement (GIC) (ChemFil Superior) when titanium tetrafluoride (TiF4) was added. Three experimental groups were prepared with TiF4 added to the liquid component of the material in concentrations of 0.5, 1, and 2%. The control group was the original form of the cement and free of TiF4. After the specimens (4 nun in diameter X 6 mm in length) were prepared, their compressive strength, microhardness, modulus of elasticity, and fluoride release were measured. Data were analyzed using one-way analysis of variance (ANOVA) and post-hoc test (Bonferroni/Dunn correction). The addition of TiF4 into GIC significantly reduced fluoride release from the material with the exception of 1% TiF4 (p < 0.0083). Compressive strengths of 0.5 and 1% TiF4-added GICs were higher than that of the original GIC, but it was not statistically significant (p > 0.05). The differences among modulus of elasticity values of experimental and control groups were not significant (p > 0.05). Similarly, microhardness of GIC was not affected with TiF4 addition (p > 0.05).