Effect of Light-Curing Modes on the Color Stability of Resin-Based Restoration Materials
Hind Humaid, Ibrahim Z Al-Shami, Abdulwahab Ismail Al-kholani, Nesrain Akwa'a, Selwan Ahmed Shaiban, Sundos Al halali, Fatima Mohammed Al Rohmi
Objectives: The aesthetic longevity of resin-based restoration materials is a critical factor in dental
practice, as color stability directly influences patient satisfaction and the overall success of restorative
procedures. This study investigates the impact of different light-curing modes on the color stability of
various resin-based materials commonly used in dental restorations.
Materials and Methods: A total of five resin composites were selected for this analysis, each subjected
to three distinct light-curing modes: standard, high-intensity, and pulse curing. Color measurements
were taken using a spectrophotometer before curing and after a simulated aging process that included
exposure to staining agents and thermal cycling. The color changes were quantified using the CIEDE2000
color difference formula, which provides a more perceptually relevant assessment of color differences.
Results: Results indicated that the curing mode significantly influenced the color stability of the resin
composites. High-intensity curing demonstrated superior color retention compared to standard and
pulse modes, particularly in materials with higher pigment concentrations. However, some composites
exhibited a tendency to darken over time, regardless of the curing method employed.
Conclusion: This study underscores the importance of selecting appropriate light-curing techniques
to enhance the aesthetic performance of resin-based restorations. The choice of light-curing mode
plays a pivotal role in the color stability of resin-based materials, which is essential for maintaining
the aesthetic integrity of dental restorations over time. Further research is warranted to explore the
underlying mechanisms affecting color stability and to optimize curing protocols for improved clinical
outcomes.
