Effect of Accelerated Aging on Color Change of Direct and Indirect Fiber-Reinforced Composite Restorations

  • Masomeh Hasani Tabatabaei Associate Professor, Department of Operative Dentistry, Dental Research Center, Faculty of Dentistry, Tehran University of Medical Sciences, Kargar Ave, Tehran
  • Farnaz Farahat Assistant Professor, Department of operative dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
  • Zahra Hassani Dentist, Private Practice
  • Elham Ahmadi Assistant Professor, Department of Operative Dentistry, Dental Research Center, Faculty of Dentistry, Tehran University of Medical Sciences, Kargar Ave, Tehran
Fiber-reinforced Composite Resins, Accelerated aging, color


Objectives: The aim of this study was to assess the effect of artificial accelerated aging (AAA) on color change of direct and indirect fiber-reinforced composite (FRC) restorations.

Materials and Methods: Direct (Z250) and indirect (Gradia) composite resins were reinforced with glass (GF) and polyethylene fibers (PF) based on the manufacturers’ instructions. Forty samples were fabricated and divided into eight groups (n=5). Four groups served as experimental groups and the remaining four served as controls. Color change (∆E) and color parameters (∆L*, ∆a*, ∆b*) were read at baseline and after AAA based on the CIELAB system. Three-way ANOVA and Tukey’s test were used for statistical analysis.

Results: Significant differences were found in ΔE, ΔL*, Δa* and Δb* among the groups after AAA (P<0.05). Most of the studied samples demonstrated an increase in lightness and a red-yellow shift after AAA.

Conclusions: The obtained ∆E values were unacceptable after AAA (∆E≥ 3.3). All indirect samples showed a green-blue shift with a reduction in lightness except for Gradia/PF+ NuliteF.

Keywords: Aging; Composite Resins; Color


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How to Cite
Hasani Tabatabaei M, Farahat F, Hassani Z, Ahmadi E. Effect of Accelerated Aging on Color Change of Direct and Indirect Fiber-Reinforced Composite Restorations. Front Dent. 13(3):168-175.
Original Article