Smart materials are advanced dental materials that respond to environmental changes, enhancing treatment outcomes in pediatric dentistry. These materials include bioactive glass, shape-memory alloys, and fluoride-releasing composites, which promote remineralization, reduce bacterial growth, and adapt to oral conditions. They improve patient comfort, minimize the need for invasive procedures, and enhance the longevity of restorations. Their use in dental fillings, orthodontics, and preventive care makes pediatric treatments more effective and child-friendly.