Lighting the Path to Longevity: The Art of Light Curing Dental Composites - A Narrative Review

Light curing plays a fundamental role in the polymerization of dental resin composites, directly influencing the mechanical properties, longevity, and esthetics of restorations. This comprehensive review explores key factors affecting polymerization efficiency, including exposure time, irradiance, beam homogeneity, curing light technology, and material properties. The importance of polywave LEDs in activating various photoinitiators is highlighted, alongside advanced curing modes such as soft-start and pulse-delay techniques, which help reduce polymerization stress and improve marginal adaptation. Additionally, challenges associated with budget curing lights, the significance of radiometer usage, and potential risks of improper curing—such as marginal leakage, reduced mechanical properties, and thermal damage—are discussed. The review also addresses infection control considerations and the hazards of blue light exposure. By adhering to evidence-based protocols and utilizing modern curing technologies, clinicians can enhance the success and durability of composite restorations.