Fluoride is one of the most significant preventive agents in modern dentistry, contributing greatly to the global reduction of dental caries. Its role extends beyond surface protection to supporting the biological processes that maintain enamel integrity. Fluoride enhances the resistance of enamel to acid attacks produced by bacterial metabolism. It also promotes remineralization, a natural repair process that restores early enamel damage before it progresses into irreversible decay. Fluoride is available in various forms, including toothpaste, mouth rinses, fluoridated water, and professional topical applications. This wide availability allows for its integration into daily preventive strategies. However, balanced use is essential. Excessive fluoride intake, particularly during tooth development, may lead to enamel changes. Therefore, professional guidance ensures safe and effective use. Ultimately, fluoride is not a substitute for proper oral hygiene, but a supportive element that works alongside brushing, flossing, and a balanced diet. Its correct use plays a vital role in maintaining strong, healthy teeth and preventing dental caries.