Cariostatic effect of fluoride-containing restorative materials associated with fluoride gels on root dentin |
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Authors: | Borges Fernanda Tavares Campos Wagner Reis da Costa Munari Lais Sant'ana Moreira Allyson Nogueira Paiva Saul Martins Magalhães Claudia Silami |
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Institution: | Department of Restorative Dentistry, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil. |
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Abstract: | Secondary caries is still the main cause of restoration replacement, especially on
the root surfaceObjectiveThis in vitro study evaluated the cariostatic effects of
fluoride-containing restorative materials associated with fluoride gels, on root
dentin.Materials and MethodsA randomized complete block design was used to test the effects of the restorative
systems, fluoride regimes and the interactions among them at different distances
from restoration margins. Standardized cavities were prepared on 240 bovine root
specimens and randomly assigned to 15 groups of treatments (n=16). Cavities were
filled with the following restorative materials: Ketac-Fil (3M-ESPE); Vitremer
(3M-ESPE); Dyract/Prime & Bond NT (Dentsply); Charisma/Gluma One Bond (Heraeus
Kulzer) and the control, Z250/Single Bond (3M-ESPE). The specimens were subjected
to a pH-cycling model designed to simulate highcaries activity. During the cycles,
1.23% acidulated phosphate fluoride, 2.0% neutral sodium fluoride or
deionized/distilled water (control) was applied to the specimens for 4 min. The
surface Knoop microhardness test was performed before (KHNi) and after
(KHNf) the pH cycles at 100, 200 and 300 mm from the margins. Dentin
microhardness loss was represented by the difference in initial and final values
(KHNi - KHNf). Data were analyzed by Friedman''s and
Wilcoxon''s tests, ANOVA and Tukey''s test (α=5%).ResultsThe interaction of restorative systems and topical treatments was not significant
(p=0.102). Dentin microhardness loss was lowest closer to the restoration.
Ketac-fil presented the highest cariostatic effect. Vitremer presented a moderate
effect, while Dyract and Charisma did not differ from the control, Z250. The
effects of neutral and acidulated fluoride gels were similar to each other and
higher than the control.ConclusionConventional and resin-modified glass ionomer cements as well as neutral and
acidulated fluoride gels inhibit the progression of artificial caries adjacent to
restorations. The associated effect of fluoride-containing restorative materials
and gels could not be demonstrated. |
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Keywords: | Fluorides Dental restoration Dental caries |
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