IADR Abstract Archives
Effect of Children’s Drinks on the Color-Stability of Restorative Materials
Objectives: Previous studies concerning color stability have shown that drinks such as coffee, tea, and Cola as well as mouth rinses have varying degrees of staining effect on different restorative materials. The staining potential of these drinks and solutions vary according to their composition and properties and discoloration of restorative materials can be induced internally or externally.Therefore, the purpose of this study was to evaluate the effects of exposure to various children's drinks (Shani, Al-Marai cocktail, chocolate milk, and distilled water as control) on the color stability of three restorative materials (Resin-composite, conventional glass-ionomer and resin modified glass-ionomer).
Methods: Cylindrical specimens were prepared from each restorative material using Mylar strip with no further trimming, finishing or polishing. All specimens were placed for thermocycling between 5°C and 55°C with a dwell time of 30 seconds and a transfer time of 5 seconds for 1500 cycles. The measurement of color was measured using a spectrophotometer (T1). The specimens were randomly assigned into 4 main groups/15 each. All specimens were immersed twice in the assigned children’s drinks (Shani, Al-Marai cocktail, chocolate milk) and distilled water as control. The measurement of color was repeated (T2 and T3). Color differences (ΔE) between T1, T2 and T3 were calculated. Statistical analyses were performed using two-way analysis of variance (ANOVA) and t-test as well as Tukey’s HSD.
Results: Comparing between drinks, the highest discoloration was seen when restorative material immersed in Shani. The lowest discoloration was seen when restorative material immersed in milk. The most significant difference in color change was evident for T2 (p<0.05).
Conclusions: Regardless of the time (testing phase), all tested restorative materials were affected by tested children drinks. Considering all tested drinks, the glass ionomer showed the most color change which was not significantly different than resin-modified glass ionomer.
Methods: Cylindrical specimens were prepared from each restorative material using Mylar strip with no further trimming, finishing or polishing. All specimens were placed for thermocycling between 5°C and 55°C with a dwell time of 30 seconds and a transfer time of 5 seconds for 1500 cycles. The measurement of color was measured using a spectrophotometer (T1). The specimens were randomly assigned into 4 main groups/15 each. All specimens were immersed twice in the assigned children’s drinks (Shani, Al-Marai cocktail, chocolate milk) and distilled water as control. The measurement of color was repeated (T2 and T3). Color differences (ΔE) between T1, T2 and T3 were calculated. Statistical analyses were performed using two-way analysis of variance (ANOVA) and t-test as well as Tukey’s HSD.
Results: Comparing between drinks, the highest discoloration was seen when restorative material immersed in Shani. The lowest discoloration was seen when restorative material immersed in milk. The most significant difference in color change was evident for T2 (p<0.05).
Conclusions: Regardless of the time (testing phase), all tested restorative materials were affected by tested children drinks. Considering all tested drinks, the glass ionomer showed the most color change which was not significantly different than resin-modified glass ionomer.
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