Oral-B Clinical Decay Control Intense Cleaning toothpaste extends the life of teeth. It actively reverses calcium loss. Oral-B's Unique Stannous Fluoride Complex technology provides superior protection against future enamel loss from dietary acids vs. ordinary fluoride toothpaste, even in between brushings. Used twice daily it reverses calcium loss by actively increasing enamel density in two critical areas: enamel surface & along the gumline