Effect of Light-Curing Modes on the Color Stability of Resin-Based Restoration Materials

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.