Benefits It is possible to treat the pain of sensitive teeth and to repair these vulnerable areas. Strengthens and protects your teeth. Restores your teeth to their natural whiteness. What is tooth sensitivity? Sensitivity occurs when the dentine underneath tooth enamel becomes exposed. When exposed dentine comes into contact with hot or cold, sweet, sour or even your toothbrush it can trigger the nerve, causing a short sharp pain. How to Use With twice daily use, new Sensodyne Repair & Protect Whitening continuously repairs your teeth