Hasham Aleem, Faisal Ahmed, Faiza Amin.
Effect of beverages and light curing unit on color stability of composites.
Pak Oral Dental J Jan ;36(4):688-90.

The aim of the study was to evaluate the effects of beverages like coffee, tea, coke and distilled water on hybrid and nano-filled composites cured by LED light and halogen light. Specimens were fabricated in Dow Dental College and tested for color change at Textile Lab, PCSIR labs complex, Karachi. A total of 80 composite specimens were fabricated. Forty composite specimens were fabricated from Filtek Z350. Twenty out of these forty specimens were cured with LED curing unit and twenty by halogen curing unit. Forty composite specimens fabricated from Esthet-X. Twenty were cured by LED curing unit and twenty by halogen curing unit. Specimens were fabricated using acrylic mold of 10mm diameter and 2mm thickness. All 4 groups were tested for baseline color change ∆E. Five specimens of each group of twenty were immersed in distilled water (control), tea, coffee and coke®. Color change ∆E values were recorded at 15 and 30 days. Statistical analysis was done by Three-Way, Repeated measure ANOVA. Post Hoc analysis was done by Dunnet’s test. At 15 days, all immersion media except control caused significant color change ∆E At 30 days, all immersion media including control caused significant color change ∆E Type of composite and curing units caused no significant color change ∆E. All composites may get discolored overtime due to different beverages. Different beverages cause different degree of staining. This can limit overall esthetic lifespan of composite restorations.

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