EFFECT OF COMMONLY CONSUMED BEVERAGES ON COLOR STABILITY OF HYBRID CERAMICS: AN IN VITRO STUDY

Abstract

Background : In everyday life, many different beverages and meals are ingested in varied amounts, acidity and colors. Each beverage has distinct influence on the oral cavity structures including the color stability of esthetic dental restorations. Objective : The current study aims to assess the color change of polymer infiltrated ceramic (Vita Enamic) after being immersed in different types of beverages, like coffee, tea and cola in comparison to distilled water as control over a 28-day test period which equals to 28 months of beverages’ consumption. Materials and methods : A total of 40 specimens were sliced from Vita Enamic blocks as each slice measures about 0.5 mm thick. Four groups were tested based on the immersion solutions. All samples were thermocycled at 15000 cycles between 5 and 55 degrees then samples were kept in 20 ml of each solution (Water, coffee, tea and cola) for at 37 ℃ for 28 days for each group. The color parameters (L-a-b) of the specimens were recorded before immersion and at the end of the 7 th (D1), 14 th (D2), 21 st (D3) and 28 th (D4) days after immersion. Color measurements were statistically analyzed with a significance threshold of P<0.05. Results : There was significant difference between four groups where (p<0.001). The differences in the color change (∆E) after staining from the highest to the lowest through all storage periods were as follows: tea > coffee > cola > water. Conclusion: Regarding the limitations of the present study, commonly consumed staining beverages influenced the color stability of the polymer infiltrated ceramics. Tea and coffee beverages produced the greatest color change beyond the acceptance range.