Now it is possible to treat the pain of sensitive teeth and to repair these vulnerable areas. With daily use, Sensodyne Advanced Repair & Protect Whitening repairs, strengthens, and protects your teeth. It forms a protective layer over sensitive areas of the teeth. Brush twice a day for lasting sensitivity protection. Fluoride helps strengthen the enamel. Sensodyne Advanced Repair & Protect Whitening also helps to restore the natural whiteness of your teeth.