Improved Flavor. with Flouride for Sensitive Teeth & Cavity Protection Relieves Painful Sensitivity. Sensodyne Extra Whitening breaks up stains to get your teeth whiter and is also gentle on your teeth. Like other Sensodyne toothpaste products, when used every day, Sensodyne Extra Whitening relieves sensitive teeth by building a protective barrier that blocks the pain caused by hot, cold, sweet, acidic and other contact triggers and it keeps it from coming back. It also leaves a fresh, clean feeling in your mouth. Sensodyne Extra Whitening is the #1 selling toothpaste for sensitive teeth in the U.S. <.