With fluoride. Br br clinically proven to relieve the pain of sensitive teeth. Br br rapid relief and long lasting protection. Br br dentist recommended brand. Br br what is tooth sensitivity? Br tooth sensitivity occurs when the softer dentine underneath hard tooth enamel becomes exposed to reveal microscopic channels that lead to the tooth nerve. When this 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. Br br how is tooth sensitivity caused? Br gum recession often as a result of over enthusiastic toothbrushing. Br enamel erosion caused by fizzy, sweet and or acidic drinks. Br wearing away of enamel. Br br how does sensodyne rapid relief work? Br sensodyne rapid relief acts rapidly to create a mineral like seal over the surface of the dentine and within the microscopic channels. This prevents stimulus from reaching the nerve. Twice daily brushing provides long lasting protection from sensitivity. Also cleans, freshens and helps strengthen enamel. Br br br gsk. Glaxosmithkline. Br