Orthodontic treatment patients often expose the metal brackets and affect the aesthetics, and even affect normal social activities, bringing inconvenience to the patient’s life because when wearing metal fixed braces. Invisible fixed orthodontic treatment is based on metal fixed braces with ceramic brackets instead of traditional metal brackets, using the color of ceramic closer to the natural tooth color to achieve the purpose of invisibility, suitable for adults with high aesthetic requirements for orthodontic treatment. At present, all kinds of ceramic brackets are made of alumina ceramic, which has good anti-pollution and anti-discoloration ability, and as long as the patient pays attention to oral hygiene, the brackets can be kept in a transparent state. Because of its high hardness, nine times that of stainless steel, alumina ceramic does not deform and has good dimensional stability. These brackets require metal ligature wires or elastic rubber bands to hold the archwire in the brackets, and special attention is often required to maintain oral hygiene during treatment in order to prevent the rubber bands from being stained by food. In addition, the characteristics of ceramic brackets in invisible fixed orthodontic treatment include stable orthodontic force, comfortable wear, and good orthodontic effect. The ceramic brackets are colorless, transparent and aesthetically pleasing, allowing patients to maintain a confident smile throughout the treatment process. It does not affect the social, work and daily life of adult patients, and is the preferred orthodontic appliance for business people and fashionable women.