Oral-B Gum & Enamel Repair Original Toothpaste for sensitive teeth helps rejuvenate gums and repair enamel in just 2 weeks. Oral-B Gum & Enamel Repair Original Toothpaste unique ActivRepair technology simultaneously helps rejuvenate gums with its antibacterial action. Furthermore, Oral-B Gum & Enamel Repair Original Toothpaste helps repair enamel and defends teeth against acid erosion. Active: Stannous Fluoride ($ ext{0.454%}$). Inactive: Glycerin, Hydrated Silica, Water, Zinc Citrate, Flavor.General Info: A toothpaste that actively repairs weakened enamel and helps revitalize gums with a Fresh flavor. Features: Stannous Fluoride formula. Gentle on teeth and gums.Adults and children 12+ years: Brush twice daily for 2 minutes.