Do you really understand whitening toothpaste?

Author: rich

Among the dazzling oral health products, one type of product is the most popular, which is tooth whitening products. The most common of them is whitening toothpaste. Brushing your teeth can make your teeth white, so simple and easy, what's the reason not to try it?

But do you really know whitening toothpaste? What is the effect of whitening teeth with brushing?

The common road to teeth whitening

To make the teeth look whiter, there are three common paths: first, remove stains. This method is more suitable for teeth that look white with normal colors and stains on the surface. The stains can make the original white teeth see the sun again; second, bleach. It is to use chemical methods to turn the teeth with abnormal colors; third, cover. It is the purpose of covering the teeth by covering the appearance of the teeth.

The whitening effect of whitening toothpaste is mainly achieved by the above channels.

"Remove" type whitening toothpaste

As we all know, the friction agent is the main role of the staining function in the toothpaste. If whitening toothpaste realizes tooth whitening by de -staining pathway, it means that its friction agent is likely to be harder than the friction agent of ordinary toothpaste, and it is more than the friction agent of ordinary toothpaste.

As the so -called "Cheng also Xiao He is defeated and Xiao He", the harder the friction agent or the more content, the stronger the stain removal ability of toothpaste, but at the same time, the greater the mechanical damage it may cause to the teeth. It is generally believed that the hardness of toothpaste friction should be lower than that of the enamel and higher than the dental hardness. Therefore, in the case of a complete teeth structure, the damage to the library enamel can be ignored. However, because the "removal" whitening toothpaste is likely to use a friction agent that is harder than ordinary toothpaste, the risk of damage to the enamel must be higher than that of ordinary toothpaste. If you use it to clean those teeth that have been exposed due to enamel damage, then its damage to the teeth will be greater. Therefore, choose the "removal" whitening toothpaste to be cautious, and be sure to do it.

What is the effect of "bleaching" whitening toothpaste?

If whitening toothpaste realizes tooth whitening by bleaching, it means that it contains bleach -peroxide. These peroxides can release hydrogen peroxide after hydrolysis and play a bleach. However, the effect of "bleaching" whitening toothpaste will be affected by many factors. The first is the stability of the bleach, so it is important to ensure that the shelf life of the bleaching agent is very important. Secondly, for safety considerations, the concentration of bleaching agents is usually limited to about 1 WT%or even lower. The dilution of hydrogen is unstable, shorter brushing time (2 to 3 minutes), and saliva, whether the low -concentration peroxide can be bleached or not is doubtful. Some researchers even believe that whitening toothpaste still depends on stains instead of bleaching to achieve teeth whitening.

The principle of "cover" whitening toothpaste

Unlike the "removal" type and "bleaching" whitening toothpaste, it should be discolored with the teeth. The coloring agent is a special dye (such as Blue Covarine), which can make the color absorption and reflection spectrum from yellow, making the teeth look whiter.

Whitening technology that is on the way

In addition to the above -mentioned common whitening channels, whitening toothpaste may also use the following technologies: ① Add bionic materials similar to the teeth structure. This bionic material can not only play the role of staining, but also adsorb to the surface of the teeth, making the teeth look whiter, but the principle of whitening is not clear; The role of this type of ingredient is mainly to prevent pigment deposition, which is a preventive whitening; ③ Add enzymes. Most enzymes can only maintain stability in the short term at room temperature, and they may cause loss during production or transportation and storage conditions, so the whitening effect is not accurate.

Although there are many whitening ways for whitening toothpaste, which can be described as "the big roads through Rome", in most cases, the whitening ability is relatively limited. Therefore, don't always send the myth of "brushing". Compared with whitening, maintaining teeth health is the fundamental significance of brushing.

The article is produced by the popular science China-Starry Cultivation Plan. Please indicate the source for reprinting

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