How does Teeth Whitening Toothpastes Work?
There are two types of whitening methods used in these whitening toothpastes. • The first type is abrasion, where mild abrasives are used to remove the debris on the teeth to expose the cleaner, whiter surface underneath. • The second type is bleaching, where peroxides are added in the toothpastes to help improved (whitened) the internal color of the teeth by bringing about a chemical change. For toothpaste that contains peroxides, some claim to have a dual action of abrasion as well as bleaching. However, the truth is many such toothpastes have very low concentration of hydrogen peroxide to really have any whitening effect on a stained tooth. In general, most teeth whitening toothpastes work purely through the abrasion process. These teeth whitening toothpaste has products such as aluminum oxide, hydrated silica, calcium carbonate or dicalcium phosphate dihydrate. These are rough molecules which can cause a scraping kind of action on the teeth when brushed onto them. This removes all
