ObjectiveThe purpose of this study was to evaluate the effect of mouth rinse solutions on
color stability, surface roughness and microhardness of two composite resins. Material and Methods Fifty test specimens of each composite (Filtek Z250 and Z350; 3M ESPE) were made
using a teflon matrix (12x2 mm). Color, surface roughness and Knoop microhardness
baseline measurements of each specimen were made and specimens (n=10) were
immersed in 5 mouth rinse solutions: G1: distilled water (control), G2: Plax
Classic, G3: Plax alcohol-free; G4: Periogard, and G5: Listerine. Final
measurements of color, roughness and microhardness were performed and the results
submitted to statistical analysis (2-way ANOVA, Bonferroni's test; p<0.05).
Results The most significant color change was observed for Z250 when immersed in
Listerine (p<0.05). Z350 showed greater color change when immersed in Plax
alcohol-free (p<0.05), but with no significant difference for Listerine
(p>0.05). With regard to roughness, both composites showed significant changes
when immersed in Listerine in comparison with Plax alcohol-free (p<0.05).
Microhardness of Z350 was shown to be significantly changed when the composite was
immersed in Plax alcohol-free (p<0.05). Conclusion Composite changes depended on the material itself rather than the mouth rinse
solution used.
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