Anastasios  Katakidis,Roussou  Konstantina,Triantafyllia  Vouzara,Dimitrios  Chatzopoulos,Charikleia  Styliara,Elisabeth  Koulaouzidou,Nikolaos  Economides,
Colour Stability of Restorative Materials: A Spectrophotometric Study
Dental Oral Biology and Craniofacial Research
2020
2613-4950
http://dx.doi.org/10.31487/j.DOBCR.2020.04.04
https://www.sciencerepository.org/colour-stability-of-restorative-materials-a-spectrophotometric-study_DOBCR-2020-4-104 
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.Keywords: Colour, resin composites, spectrophotometer, stability, staining