I used it, and my teeth are really white. But it can only be attached to the front tooth bag, not to the back and inside. It is yellow. It would be a little strange if you could see inside. It can last about 10 months. However, my teeth were a little sensitive when I first used the sticker. I can't eat anything too sour or too cold. It's best to keep it after I use my teeth. I don't think so. Improper use of teeth can cause damage to gums. The active ingredient of regular brand whitening toothpaste is low concentration hydrogen peroxide. When the concentration is below 10%, it can not only ensure the safety of teeth and gums, but also achieve the effect of whitening. However, the wearing cycle should be calculated every week, and it will take at least 2 weeks to have obvious effects. In addition, the effect of peroxide on tooth surface during whitening process makes teeth more susceptible to the influence of pigments in food and drinks.

Gingival operation is simple, and it can achieve the effect of rapid whitening, so it is very safe. However, according to national regulations, whitening products and tooth whitening equipment that are in direct contact with teeth must be certified as Class III medical equipment by the Food and Drug Administration. Otherwise, sales are prohibited. It is forbidden to use cosmetic size (that is, the batch number of cosmetics, and it is no longer allowed to apply for this type of products at first). It can only be produced by medical drugs or machinery enterprises, and has passed the certification and recognition of the US Food and Drug Administration. There are many patch brands on the market, but most of them do not meet the standards of three kinds of medical devices, such as familiar brands. Crest does not meet Class III medical equipment.

Whitening stickers are not suitable for everyone. Especially people with dental diseases. "Glaze can protect the essence of internal teeth, but some people's glazes are naturally underdeveloped. Once the whitening patch is used, the acidic components attached to the teeth will destroy the enamel and cause harm to the teeth. This fact is invisible to them. If people with healthy teeth use it, it also has the function of self-recovery for a period of time. People with symptoms such as periodontal atrophy stimulate gums with whitening gums, causing tooth nerve pain. Especially for people with tooth allergy, once osteomyelitis is caused, it is difficult to recover. Lingling said that children and young people had better not use whitening stickers. Their gums have a high angle and are not fully developed. Whitening gums will stimulate the teeth nerves, and the teeth will be glazed thin, sensitive to cold and heat, which will damage the teeth.

We must first know what the principle of whitening toothpaste is. In fact, some chemicals are used to bleach teeth. At present, the most common and mainstream is hydrogen peroxide, which is often mixed with water. The process of bleaching is to use the strong oxidation of hydrogen peroxide to make the macromolecular pigment penetrate into enamel and dentin and break it down into small molecules, which will spread to the surface of teeth, change the color of teeth and complete tooth bleaching. Because it contains chemicals such as hydrogen peroxide, you must choose a formal enterprise when using tooth bleaching products to avoid damaging teeth or gums. But not everyone can use it. Teeth themselves have dentin hypersensitivity and gum problems. After use, the feeling of sensitive acid is stronger than that of normal healthy teeth, so choose carefully.