When the Iron Man regretted not being armed with teeth, the “steel tooth girl” was already on the prowl, perhaps the silver shiny braces made the children a bit more cute and innocent, but the abruptness of the iron mouth and copper teeth could not help but make many adults stop, and the dream of the ugly duckling becoming the white swan seemed so far away from us as adults. In the late 20th century, with the development of material technology and computer-aided design, bracketless invisible orthodontics gradually entered the orthodontic field of vision, and its 3D three-dimensional technology, to create the original electronic model of the patient’s teeth. Through 3D stereoscopic technology, the original electronic model of the patient’s dentition is established, and after computer-aided prediction and design, the entire orthodontic treatment is subdivided into steps, and with the technical support of rapid processing and molding, the generation of personalized, nearly transparent aligners for the patient is realized, and with the necessary clinical treatment, the misaligned teeth can be quietly made beautiful without being seen or heard. As the technology continues to mature, invisible orthodontics has also gone from being initially applied only to exclude cases of crowding, closing loose gaps, and simple misalignment, to now being able to basically better address all types of misaligned jaws, including more serious Class II and III misalignments. And in the orthodontic treatment of periodontal disease, with cosmetic restoration, implant restoration, because of its unique biomechanical model, aesthetic advantages to bring a new experience, and by the clinical doctors and patients. The development of things is always from small to large, from weak to strong, through the clever interpolation of various technologies by clinicians, the scope of application of invisible orthodontics is gradually expanding, and beauty has quietly become within reach.