In the entertainment circle, there has been a saying that "cosmetic surgery is comparable to cosmetic surgery". Many ordinary people also hope to improve their appearance by "beautifying" their teeth. As the "March 8th" international working women's Day approaches, major e-commerce companies have opened the "goddess day" Carnival. Many people want to take the opportunity to "chop their hands" and "arm" their teeth and their families. However, is the popular products sold online, such as tooth flushing device, whitening paste, Whitening Pen and children's U-shaped toothbrush, an "artifact" or an IQ tax? In this regard, the reporter of science and technology daily interviewed Liu Dawei, the chief stomatologist of Tianjin debier, and asked him to analyze these dental products one by one. "Net red" orthodontic braces: wear high risk, orthodontics should go to a professional hospital Earth covered sky, buckteeth, shark teeth... Because the lips are close to the teeth, the deformed teeth will affect the lip shape and lower the appearance. Therefore, many people hope to make themselves look good through orthodontics. "In fact, orthodontics is not only to make your face look good, but also to keep your teeth healthy." Liu Dawei introduced that orthodontic treatment can improve the chewing efficiency of teeth, reduce dental caries and even mandibular joint problems. At the same time, arranging the teeth neatly can also reduce the impaction of food and the formation of calculus, so as to reduce the occurrence of dental caries and periodontal lesions, and finally achieve the purpose of prolonging the life of teeth. Many people feel that going to a professional dental hospital for orthodontics is expensive and the process is complex, so they choose self-help Orthodontics - buy transparent appliances online. The price of the products ranges from more than ten yuan to thousands of yuan. The merchants claim that "they can complete tooth shaping within one or two months". Silica gel appliances, which are sold cheaply on the Internet, are similar in shape to children's muscle function trainers. The muscle function trainer is made of silica gel materials with different degrees of softness and hardness. It can correct wrong muscle function, correct bad oral habits and align teeth through its unique design. "But the muscle function training device is a medical device. It takes a long time to collect a large amount of clinical data and produce it on the basis of full research." Liu Dawei pointed out that at present, there are many miscellaneous products on the market. Although they look like muscle function trainers, the use effect is difficult to be guaranteed, and it may be counterproductive. "Many people think that the transparent appliance sold online is very similar to the invisible braces used in hospitals." Liu Dawei said that in regular hospitals, making invisible braces is very complicated. "Before orthodontics, it is necessary to take X-rays, oral cone beam CT, scan oral teeth, 3D print tooth models, etc. orthodontists will measure and analyze the patient's dentition and bones according to various images and model data. After fully evaluating the degree of tooth and jaw deformity, doctors can formulate treatment plans." Liu Dawei said that orthodontists will customize more than ten to dozens of pairs of invisible braces according to the patient's face shape, the positional relationship between the maxilla and mandible (tooth occlusion), the periodontal root and the temporomandibular joint. Patients need to change a pair every two weeks and ensure to wear it for more than 22 hours a day. Such a complicated process can not be achieved by "cloud operation" on the Internet. "Orthodontics is a professional medical behavior, and the risk of self-operation is very high." Liu Dawei reminded that scientific orthodontics is to apply a mild external force to each tooth by wearing braces to promote its slow movement, and the alveolar bone will be reconstructed during the tooth movement, so as to finally achieve the ideal orthodontic effect, which generally takes months to two or three years. Whitening paste and Whitening Pen: not necessarily effective, but may also lead to dental acid and gum damage As the saying goes, "a white cover a hundred ugly", this sentence also applies to teeth. Many women said that if their teeth are not white enough, they even have to choose the red number. Many girls feel inferior because of their yellow teeth and dare not show their teeth and laugh. Such a situation has also led to the rapid popularity of affordable "white tooth artifact" such as whitening paste and whitening pen. "It takes seven days to get results, yellow teeth become white teeth", "one paste and one tear every day, teeth can be white with a color number" and other advertising slogans have made many people's hearts beat. On the e-commerce platform, the sales volume of many such products exceeds 100000. After use, some people's gums are not only sour, but also their teeth are not white. "The main component of whitening paste and whitening pen is peroxide, which plays a bleaching role through oxidation-reduction reaction." Liu Dawei said that they have poor whitening effect on endogenous tooth yellowing such as tetracycline teeth and dental fluorosis; It also does not play much role in tooth yellowing caused by exogenous pigmentation such as drinking tea and smoking. In addition, each person's tooth color is different, and the use effect also has individual differences. For many people who have symptoms such as dental acid after using whitening paste and Whitening Pen, Liu Dawei explained that it is because the penetration of whitening drugs into the tooth body will stimulate the dental pulp. If these substances act on the teeth for a long time, they will make the teeth sensitive and make people feel dental acid. Moreover, long-term exposure to high concentration peroxide is also easy to damage gingival soft tissue. "For people with congenital hypoplasia of enamel, tooth whitening products are not recommended." Liu Dawei added that because the acidic components in the peroxide may damage the enamel and make the tooth surface very rough, causing irreversible damage. Liu Dawei said that the color of normal and healthy teeth is yellowish. There is no need to deliberately pursue the brightness and whiteness of teeth. Tooth health is the most important. Children's U-shaped toothbrush: there are a large number of cleaning blind areas, increasing the risk of dental caries Children should receive oral care every day after birth. However, how difficult it is for children to brush their teeth well must be deeply experienced by their parents. Therefore, when children's U-shaped toothbrush appeared, it became popular quickly and was welcomed by parents. This U-shaped toothbrush, also known as lazy toothbrush, has a U-shaped brush head, which is similar to the arrangement of teeth in the mouth. Many children's U-shaped toothbrushes are cute, and they also bring their own lights, nursery rhymes and so on. The merchant declared that "as long as you open your mouth, insert the toothbrush and shake it left and right, you can complete the big project of brushing your teeth", and "360 degree package and no dead corner of brushing your teeth" and "babies can operate by themselves", which sounds like the gospel of parents. As everyone knows, this U-shaped toothbrush has no benefit for children with frequent caries. "The U-shaped toothbrush is cute and easy to use, but it can't let children master the correct brushing method." Liu Dawei explained that the shape of the brush head of the U-shaped toothbrush is fixed, which is difficult to fully fit all sides of the child's teeth. In addition, some children may be lazy and use it not in place, there will be a large number of cleaning blind areas. In addition, the bristles of the U-shaped toothbrush on the market are almost made of silica gel. This kind of bristle is soft and loose, and the cleaning force is poor. It is impossible to completely remove dental plaque and soft dirt hidden between teeth and gingival sulcus. Long term use of this toothbrush will increase the risk of dental caries, and even lead to tooth or soft tissue diseases. Liu Dawei suggested that when choosing dental cleaning products for children, they should choose those suitable for children's age. For example, toothbrushes should be small and soft, and toothpastes should be fluorinated. (Xinhua News Agency)