Color Stability Assessment of Three Different Resin Composites After Polymerization with Two Different Light-Curing Units

Authors : Ruhsan MÜDÜROĞLU ADIGÜZEL, Adil NALCACİ

Pages : 70-75

Doi:10.52037/eads.2023.0019

View : 45 | Download : 54

Publication Date : 2023-08-31

Article Type : Research Paper

Abstract :Purpose: Despite improvements in resin composite structures, color stability remains a challenge, and esthetic problems are the most common factors in renewing restorations. This study aimed to evaluate the effects of two light-curing units on the color stability of three different resin composite materials during a six-month period. Materials & Methods: Three different resin composites insert ignore into journalissuearticles values(Filtek Z550, Filtek Ultimate Flowable, Filtek Bulk Fill Restorative); with an A2 color shade were prepared for each combination of resin composite-curing unit insert ignore into journalissuearticles values(5x2mm); for a total of 30 specimens. Specimens were cured with either QTH Hilux Ultraplus insert ignore into journalissuearticles values(700mW/cm2); for 40 seconds or Radii Plus LED Curing Light insert ignore into journalissuearticles values(1400mW/cm2); for 20 seconds. For standardization of the amount of transmitted energy to the composite, all specimens received 28J/cm2. Color parameters were measured with a colorimeter insert ignore into journalissuearticles values(Minolta CR-321, Konica Minolta Sensing Pte Ltd, Singapore); after polymerization and at 24 hours, first week, first month, third month, and sixth month. Color changesinsert ignore into journalissuearticles values(∆E); were calculated for the different storage periods. One-factor repeated three-way analysis of variance insert ignore into journalissuearticles values(ANOVA); was used to examine the changes in ΔE measurements over time for different fillers and devices. Results: Significant differences between composites and periods were observed in the color stability with polymerization either QTH or LED. Independently of the composites, there was no significant difference at the end of six months between QTH and LED units with a fixed energy density. The Filtek Z550 material showed the smallest and the Filtek Ultimate Flowable material showed the highest ∆E values at the end of the six months among the materials used. Conclusion: Clinically acceptable color changes were observed for all the materials at the end of six months.
Keywords : Resin composites, color stability, quartz tungsten halogen, light emitting diode