| abstract |
Toothpaste comprising an addition of a dye and a reducing agent for bleaching said toothpaste under the effect of brushing, characterized in that it consists of a fluoride-based toothpaste, of the type available commercially, comprising methylene blue in a proportion of the order of 500 μl to 1 ml, in solution at 1 mg / ml, for 5 g of toothpaste, ie a proportion of the order of 0.125 to 0.250 μM per gram of toothpaste and a reducing agent consisting of sodium ascorbate in powder form which is added at the time of use. |