Sensitivity can be a sign that your teeth are vulnerable due to enamel loss or gum recession. With twice daily brushing, its Novamin formulation has been developed to help provide sensitive teeth with everything they need. What is tooth sensitivity? Sensitivity can be a sign that your teeth are vulnerable, as dentine becomes exposed due to enamel loss or gum recession. When exposed dentine comes into contact with hot or cold, sweet or sour, or even your toothbrush, it can trigger the nerve inside the tooth causing a short sharp pain. It is a Dentist recommended brand, clinically proven relief and daily protection for sensitive teeth,strengthens & rehardens enamel, fresh and clean feeling,protects against plaque, novamin restores a protective layer over sensitive areas to shield you from pain, maintains healthy gums.