At Castlebury Dental—your trusted dentist in Eagle, ID—we believe in more than just a simple cleaning. We use fluoride treatments to give your teeth an extra layer of protection. What Is Fluoride and How Does It Work Fluoride is a mineral that can combine with other elements (like tin or sodium) to form compounds that help strengthen teeth. For decades, dental professionals have used fluoride—especially in the form called stannous fluoride—to protect teeth against decay. When applied to your teeth, fluoride helps convert enamel’s natural