I have used it and my teeth are really white. But it can only be affixed to the front of the teeth package, can not be affixed to the back and inside the place is yellow. If you can see inside, it's a bit strange, can be maintained for about 10 months. But just after using the stickers when the teeth nerves are a little sensitive, can not eat too acidic and cold things, after using the teeth or leave it better. It doesn't seem to work. Improper use of teeth will cause damage to the gums. The active ingredient of the regular brand whitening teeth stickers is a low concentration of peroxide, the concentration of 10% or less, can ensure the safety of teeth and gums to achieve the whitening effect, but the wearing cycle should be calculated weekly, at least 2 weeks or more in order to have a significant effect. In addition, the effect of peroxide on the surface of the teeth during whitening makes the teeth more susceptible to the effects of pigments in food and drinks.
The gums are safe as they are easy to operate and can achieve quick whitening results. But the state regulations, direct contact with teeth whitening products and teeth whitening equipment must be certified by the Food and Drug Administration of the three types of medical equipment. Otherwise, sales are prohibited. Prohibit the use of cosmetic sizes (i.e., cosmetic batch numbers, began to no longer allow applications for this type of product) can only be produced by medical drugs or mechanical enterprises, and get the certification of the State Food and Drug Administration recognized. There are many brands of stickers on the market, but most of them do not meet the standards for three types of medical devices such as the brands we are familiar with. Crest does not meet the three types of medical devices.
Whitening stickers are not for everyone. Especially people with diseases on their teeth. "Enamel has a role in protecting the inner tooth essence, but some people's enamel is naturally underdeveloped, and once the whitening stickers are used, the acidic ingredients on the stickers can destroy the enamel and cause damage to the teeth, a fact that is not visible on its own. They also have the ability to recover on their own over a period of time if used by people with healthy teeth. The use of whitening gums by people with periodontal atrophy and other symptoms can irritate the gums and cause nerve pain. Especially people with tooth allergies will have a hard time recovering once they cause osteomyelitis. Children and young people are better off not using whitening stickers, Ling said. Their gum angle is higher, not fully developed, whitening gums more stimulate the tooth nerve, the teeth on the enamel is also thin, the sensitivity to hot and cold, will damage the teeth.
We first need to know what is the principle of whitening teeth stickers. In fact, it is through some chemical composition bleaching teeth. Currently the most common and mainstream is hydrogen peroxide in peroxide, mixed with water is often referred to as hydrogen peroxide. The process of bleaching is to use the strong oxidizing property of hydrogen peroxide, when penetrating the enamel and dentin, the large molecules of pigment in it will be broken into small molecules and dispersed to the surface of the teeth, changing the color of the teeth, and completing the bleaching of the teeth. Because of the presence of hydrogen peroxide and other chemicals, teeth bleaching products must be used in the use of formal enterprises, so as not to damage the teeth or gums. But not everyone can use it. The teeth themselves have tooth sensitivity and gum problems. The feeling of sensitive acid after use is stronger than the average healthy teeth, so choose carefully.