”Fast teeth straightening in seven days!” “A new technology originating from Europe, America, Japan and Korea!” “No extraction, no damage to restore teeth!” An online search for “cosmetic crown” reveals tens of thousands of advertisements for such orthodontics. Even in the Baidu encyclopedia entry also said that the “crown” surgery has the advantages of no tooth extraction, no pain, short time, and no black lines on the gums after many years. In fact, crowns are an invention of cosmetic surgery hospitals, but there is no such term in the dental profession, so we should reject the crown procedure. The dental profession refers to dental crowns, that is, porcelain crowns, all-porcelain crowns and metal crowns, the first two can be used for tooth appearance restoration. However, they are generally used only for the restoration of teeth due to caries, trauma, congenital malformation, such as chipped, bad color, etc. Generally, only the necessary polishing of the tooth is done, and then the crown is installed. It does not change the axis and position of the tooth, does not intentionally thicken the walls of the crown, does not intentionally grind the tooth too much, and does not hurt the gums and root canals. In order to earn high profits, cosmetic organizations abuse crown restorations, making up new terms such as “cosmetic crowns” to lure consumers. In fact, the essence of the original healthy teeth is to grind small, or even cut off the teeth, to destroy the position and angle of the healthy teeth, and then use artificial crowns to repair, in the short term to achieve the appearance of neat and consistent effect, but this is very harmful to the teeth themselves. The most safe and effective method of orthodontic treatment is orthodontics, that is, through a variety of orthodontic devices to adjust the balance and coordination between facial bone, teeth, jaw nerve muscles, commonly known as “wearing braces”, generally speaking, it takes one or two years of regular follow-up. If you really need to correct your teeth, it is best to choose a regular hospital to wear braces orthodontics. In addition, if you come across a dentist who doesn’t take pictures after root canal treatment, who guarantees that root canal surgery will never hurt, who claims that dental implants are for life, who claims that porcelain teeth are for life, who claims that orthodontics can be done quickly in a few days, be sure to be wary of the qualifications of this institution. For patients who have been deceived, make sure to go to a regular hospital for radiographs to detect problems early and remove them early to prevent problems such as periodontal tissue lesions and pulp infection and septicemia.