Colour Stability of Restorative Materials: A Spectrophotometric Study

Abstract

Background: Colour stability of esthetic restorative materials is a crucial factor for restorations success. The aim of this study to determine the colour stability of two newly introduced composite resins after artificial aging in coffee and black tea. Materials and Methods: Disk-shaped specimens from each resin composite (Ceram X one, Dentsply, Germany and G-aenial, GC Corporation, Japan) were prepared and immersed in coffee, tea or distilled water for 24hours and one month. Colour measurements were made at baseline, 24hours and one-month intervals using a reflectance spectrophotometer (UV-VIS 2401PC, SHIMADZU, Japan) and the CIEDE2000 system. Statistical Analysis: Mean values and standard deviation were figured out for each specimen and data were statistically analysed with the use of IBM® SPSS® Statistics for Windows, Version 25. Results: For both time periods of immersion in coffee, there were no statistically significant differences between mean ΔΕ values of the tested materials (P>0.05). One month after immersion in tea, ΔΕ values of Ceram X one and G-aenial presented statistically significant difference (P<0.05). Conclusion: Coffee showed the greatest staining potential, followed by black tea. After one-month immersion in coffee, ΔΕ was material independent. Conversely, after one-month aging in tea, the colour difference ΔE was material and time dependent.