EFFECTS OF DIFFERENT DRINKS ON COLOR STABILITY OF TOOTH-COLORED RESTORATIVE MATERIALS

Aim: The aim of this in vitro study was to evaluate the color stability of three different tooth-colored restorative materials (a microhybrid resin composite [Charisma [Heraeus-Kulzer] , a nanohybrid resin composite [Ice [SDI] and an enhanced resin modified glass ionomer cement [ACTIVA Restorative [Pulpdent]) after immersion in five different staining solutions (tea, coffee, cola, red wine and distilled water). Material and Methods:45 cylindirical specimens of 5 mm in diameter and 2 mm in thickness of each restorative material (totally 135 specimens) were prepared using a plexiglass mold. After immersion of all specimens in distilled water for 24 hours, first color measurements were obtained using a spectrophotometer. After first color measurements, specimens were randomly divided into five groups (n=9) and stored in five different staining solutions for 28 days. Solutions were refreshed daily during the test period and second color measurements were obtained at the end of study. The color changes(ΔE) were calculated and were statistically analyzed using Kruskal-Wallis Test. Results: ΔE values of tested materials were ranged between 0.63 and 27.55 after 28 days of immersion in the staining solutions. For all tested materials the highest ΔE values were obtained when specimens immersed in red wine. Red wine, coffee and tea caused significant color change in all tested materials. Color of restorative materials immersed in distilled water didn’t change sinificantly after 28 days test period. Conclusion:Long term exposure to red wine, coffee and tea can affect color stability of tested restorative materials. Keywords:Microhybrid composite, nanohybrid composite, enhanced resin modified glass ionomer cement, color stability