Sodium monofluorophosphate in toothpaste originated in the 1960s, where it was widely adopted as an effective anti-caries agent in toothpaste and mouthwash. It is globally recognized as one of the safest and most effective fluoride sources, ranking alongside sodium fluoride and stannous fluoride as the three most common fluorides in toothpaste. Its core function is undoubtedly preventing dental caries (cavities). However, its mechanism of action differs from other fluorides, embodying a “calm yet effective” approach.

• Ingenious “Sustained Release” and “Transformation”: Monofluorophosphate itself does not directly provide fluoride ions. Within toothpaste, it remains stable. Upon entering the oral cavity, it undergoes hydrolysis under the action of enzymes produced by saliva and oral bacteria, slowly releasing bioactive fluoride ions. These ions then permeate into the enamel, reacting with hydroxyapatite to form fluorapatite—a stronger, more acid-resistant mineral. This fundamentally fortifies teeth against erosion by acidic substances.
• Promoter of Remineralization: The onset of tooth decay begins with enamel demineralization. The fluoride ions released by sodium monofluorophosphate not only prevent demineralization but also significantly promote the remineralization of early caries lesions (micro-white spots). This is the natural process of tooth repair, achieving a leap from “prevention” to “treatment.”
• Inhibiting Bacterial Metabolism: While its direct antibacterial effect is less potent than stannous fluoride, it still mildly disrupts the sugar metabolism of cariogenic bacteria in the mouth, indirectly reducing the production of acidic byproducts.