In vitro evaluation of dental color stability using various esthetic restorative materials after immersion in different drinks

Abstract

Background Currently, the demands for restorations have increased considerably; thus, improvements and modifications have been made in dental composite technologies especially using materials that have claimed to improve color stability. Objective This study aimed to determine the effect of restorative materials on dental color stability in vitro using various solutions. Methods In this study, the study samples were composed of 45 discs from different restorative materials (15 micro-hybrids, 15 nano-hybrids, and 15 glass ionomers). These discs were immersed in various beverages an hour a day for one month at room temperature. The color stability was measured using a spectrophotometer before/after immersion (days 7 and 30). Results We realized a significant difference in color change with Coca-Cola and tea after 7 days and 30 days (p < 0.05). However, no significant difference in the samples immersed in DM after seven days and 30 days (p > 0.05) was found. The highest value of lightness (∆L), and stainability (∆a) was seen in micro-hybrid after 30 days of immersion in tea solution (-12.16 ± 1.74 and 11.4 ± 3.82, respectively), while most samples had a positive ∆b value. Conclusion The black-tea affected the color stability of all used restorative materials after one month. In addition, micro-hybrid had higher color stability than nano-hybrid and glass ionomer.