❶ Whitening Toothpastes: Types, Action

A snow-white smile is the dream of many people, because it is an indispensable element of a prepossessing smile and attractive appearance. But unfortunately, many people have teeth that are either yellow by nature, or under the influence of external factors, become such. You can whiten your teeth not only in dentistry, but also at home using a whitening toothpaste. Location: Location:

Whitening toothpastes differ not only in smell, taste and color, but in composition. Such pastes can be divided into two groups: containing bleaching chemicals and pastes that are highly abrasive.

Toothpastes of the first group contain strong oxidants (hydrogen peroxide or urea). These substances, getting on the tooth enamel, actively produce oxygen free radicals. As a result, the pigments (due to which the enamel becomes yellow) are oxidized and become colorless, and the teeth become white. The advantage of such pastes is a quick result. But these pastes quickly destroy tooth enamel. Therefore, using toothpastes containing whitening chemicals should be done only after consulting a dentist and under his supervision.

Toothpastes with a high abrasive content are recommended for intensive cleaning of pigmented enamel in smokers, coffee and strong tea abusers. Such pastes contain abrasive substances: dicalcium phosphate, silicon oxide, or aluminum oxide. These substances can make up from 20 to 40 percent of the total volume of the toothpaste. Abrasives remove plaque from tooth enamel using physical force, like sandpaper. As a result, the teeth become whiter. But when cleaning plaque, they wear off the top layer of enamel. In addition to the fact that such pastes damage the enamel (as a result, the teeth become sensitive), they also have a negative effect on the gums. Most of all the whitening pastes on sale belong to this group. The size of the abrasive particles is indicated by the RDA index. Paste with RDA above 250,experts do not recommend using more than twice a week.