1, ordinary orthodontics, is what we usually see “steel teeth” orthodontic methods, with bonding will be orthodontic devices glued to the teeth, the patient can not take off and wear, only by the orthodontist assembly and disassembly, adjustment and force. The orthodontist can only install and dismantle the braces and adjust the force. Once a month, the orthodontist will gradually increase the force to make the teeth move and reach the ideal state as designed. After removal of the aligners, a period of time is required to wear retainers to consolidate the orthodontic results and prevent relapse. In order to address the need for adults to wear fixed aligners that are less aesthetically pleasing and affect work and social activities, clear ceramic brackets are now widely used in adult orthodontics. This bracket is made of advanced ceramic material, is transparent, stick to the teeth is not so obvious. 2, invisible orthodontics, invisible orthodontics is to install all the aligners on the lingual side of the teeth for orthodontic treatment, so also known as lingual orthodontics. This orthodontic method is invisible from the outside of the aligner, orthodontic treatment during the normal social and professional activities can still be carried out. Unknowingly, the alignment of the teeth is changed and the facial appearance is altered. As soon as this technology was introduced, it was warmly welcomed by the aesthetically or professionally demanding and beauty-loving people such as entertainers, models, teachers and civil servants. With the continuous development and improvement of invisible lingual orthodontic technology, “personalized invisible lingual orthodontic technology” emerged, which is the most advanced technology in invisible lingual orthodontic technology and is currently the most popular invisible lingual orthodontic technology in Europe. The technology uses computer-aided design and processing (CAD/CAM) to produce orthodontic appliances (the patient’s dental model sent to Germany for processing and production), so the orthodontic appliances are more accurate, smaller, less oral foreign body sensation, greatly improving the comfort of patients, and the use of robotic bending orthodontic arch wire, greatly improving the accuracy of orthodontic treatment and orthodontic effect, shortening the course of orthodontic treatment. 3, porcelain orthodontics, porcelain orthodontics is the way to correct malformed teeth by doing porcelain teeth, is to evenly grind away a circle of their own teeth, and then set a porcelain crown.