Light-curing units are essential devices in restorative dentistry used to polymerize light-activated dental materials such as composites, bonding agents, and sealants. Their effectiveness depends on factors like wavelength compatibility, light intensity, exposure time, and proper positioning. Appropriate use ensures adequate depth of cure, improved mechanical properties, and long-term restoration durability, while improper curing can lead to marginal leakage, postoperative sensitivity, and restoration failure. Understanding their correct clinical application helps achieve predictable and successful treatment outcomes.
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