1. Meiguan Orthodontics: Meiguan is a new orthodontic technology popular in Europe, America, Japan and South Korea. On the basis of traditional porcelain teeth, it emphasizes the cosmetic effect of teeth, applies professional means to clinical full crowns of dislocated teeth and deformed teeth, and finally uses beauty crown to restore them. It has the advantages of no tooth extraction, no pain, short time, firm teeth and no black line in gums after many years, so as to achieve a life-long guaranteed tooth beauty effect. 2. Orthodontic method of porcelain teeth: The orthodontic technique of porcelain teeth is to make metal base with alloy, then cover its surface with low melting point porcelain powder similar to natural teeth, and sinter it in vacuum high temperature porcelain furnace, which has both the strength of metal and the beauty of porcelain crown. 3, braces orthodontics: braces orthodontics technology, the principle of braces is to use a cover similar to a mold to fix orthodontics. By gradually increasing the pressure, the teeth are arranged neatly, which is a long process. 4. Bracket-free invisible orthodontics: Bracket-free invisible orthodontics. The traditional orthodontic appliance is to stick a small iron piece called a bracket to the teeth and tie the orthodontic arch wire to move the teeth to achieve the purpose of correction. 5. Korean surgical orthodontics: Korean surgical orthodontics is suitable for people who lose the opportunity to use orthodontic appliances in adulthood. The technique is minimally invasive alveolar bone opening, which directly adjusts the relationship between teeth and jaws.