Investigation of Short and Long Term Effects of Various Mouthwashes on the Color Stability of Hybrid Composites

Abstract

Objective:The color stability of dental composite restorations is an important criteria for clinical success. This study aimed to investigate the long-term effects of various mouthwashes on the staining of direct composites.Methods:Disc-shaped samples were prepared by using 4 different commercially available hybrid composites (Clearfil Majesty, Kuraray; Charisma Smart, Heraeus Kulzer; Quadrant Universal, Cavex; Brilliant EverGlow, Coltene) and divided randomly into five groups according to mouthwashes: Sensodyne, Oral B 3D White Luxe Glamorous Shine, Listerine, Colgate Plax, Meridol. Initial colors of specimens were measured by using a spectrophotometer (Vita Easyshade V, Germany). Specimens were immersed in the mouthwashes and stored in an incubator set at 37 °C for 12, 60, and 120 hours, equivalent to daily use of mouthwash for 1, 5, and 10 years, respectively. Subsequently, the color change value of different materials was calculated as ΔE*ab. The data were analyzed by ANOVA and paired sample t-tests.Results:The mouthwash type and application time affected the color change values (p=0.00). The most color change (ΔE*) was observed in Colgate Plax, followed by Meridol. The least ΔE* was observed in Sensodyne after 1 year and in Oral B after 5 and 10 years. The materials showing the least and most ΔE* after 1-year mouthwash application were Brilliant and Quadrant, respectively. The least and most ΔE* after 5 and 10 years were observed in Brilliant and Charisma groups, respectively.Conclusion:The staining in composite restorations caused by mouthwashes varies depending on the structural properties of the resin composite, the pH of the mouthwashes, and exposure time.

Keywords

• coloration
• color measurement
• composite resins
• mouthwashes
• spectrophotometry