ABSTRACT
Objectives: The aim of this study was to evaluate the effects of 3 commercially available
mouth rinses on the color stability of 4 different resin-based composite restorative
materials.
Methods: Forty disc-shaped specimens (10x2 mm) were prepared from each of the following
materials: A nanofill composite Filtek Supreme XT (3M/Espe, St. Paul, MN, USA); a
packable lowshrinkage composite, AeliteLS Packable (BISCO, Inc, Shaumburg, IL, USA);
nanoceramic compositeresin Ceram-X (Dentsply, Konstanz, Germany); a microhybrid composite,
and Aelite All-Purpose Body (BISCO). The specimens were then incubated in distilled
water at 37°C for 24 hours. The baseline color values (L*, a*, b*) of each specimen
were measured with a colorimeter according to the CIELAB color scale. After baseline
color measurements, 10 randomly selected specimens from each group were immersed in
1 of the 3 mouth rinses and distilled water as control. The specimens were stored
in 20 mL of each mouth rinse (Oral B Alcohol-free, Listerine Tooth Defense Anti-cavity
Fluoride Rinse and Klorhex) for 12 hours. After immersion, the color values of all
specimens were remeasured, and the color change value ΔE*ab was calculated. Data were
analyzed using a 2-way analysis of variance at a significance level of .05.
Results: All specimens displayed color changes after immersion, and there was a statistically
significant difference among restorative materials and mouth rinses (P<.05); however,
the change was not visually perceptible (ΔE*ab<3.3). The interaction between the effect
of mouth rinses and type of restorative materials was not statistically significant
(P>.05).
Conclusions: It may be concluded that although visually nonperceptible, all resin
restorative materials tested showed a color difference after immersion in different
mouth rinses. (Eur J Dent 2008;2:247-253)
Key Words:
Mouth rinse - Resin composites - Color
