The orthodontic appliances in use today are based on the square wire orthodontic appliances proposed by Dr. Agnel in the early 20th century. Rapid improvements in orthodontic appliance technology, materials, techniques and techniques have made orthodontic treatment more effective, comfortable and aesthetically pleasing to patients, and in 1990, adult patients accounted for almost 25% of all orthodontic patients, a trend due to an increase in the number of orthodontic patients over the age of 40. Most adult patients are more concerned with the appearance of their orthodontic appliances. Today, there is a great demand for aesthetic orthodontic appliances. Since the 1970s, when the direct-adhesive technique was introduced, orthodontists have been able to bond bracket attachments to the lingual surfaces of the teeth, resulting in a significant improvement in the aesthetics of fixed aligners. Unfortunately, however, the small distance between the brackets and the space for manipulation make the lingual fixed orthodontic technique difficult and time-consuming to perform. In the late 1980s, the development of ceramic brackets provided orthodontic patients with a new option for an aesthetic aligner. However, even ceramic brackets are still bonded to the tooth surface and to the metal archwires, so the metal archwire portion of the brackets is still visible, despite the significant aesthetic improvement over metal brackets. Bracketless invisible aligners offer greater aesthetic and comfort advantages than any other existing orthodontic treatment. Advantages of Invisalign: Aesthetics: Invisalign aligners are transparent, comfortable and removable. The aligners are transparent and not easily visible, and patients can wear them in important private or public places. Removability: Invisible aligners are removable, so patients can maintain their daily oral hygiene habits and eat as much as they want after removing the aligners without worrying about food sticking to the aligners or damaging them. Comfort: Invisible aligners are more comfortable because they do not irritate the buccal mucosa and surrounding soft tissues like brackets and archwires do. Because there are no relatively bulky brackets or archwires, patients wearing aligners also do not need to use protective devices such as protective wax and plastic sleeve devices. Suitable for teeth with defective enamel: Some patients are unable to wear traditional fixed aligners because they are allergic to metal or nickel elements, or cannot affix fixed aligners because of abnormal enamel development, in which case invisible aligners can be used. Not susceptible to root resorption: There have been no reports of root resorption in patients wearing invisible aligners. Invisible aligners provide precise control of tooth movement as defined by the clinician, and the amount of tooth movement in each aligner step is set according to the clinician’s requirements, resulting in less force on the teeth and a more physiological movement process. Less discomfort and pain: Some adult patients who wore fixed aligners as teenagers and now receive invisible aligners report that invisible aligner treatment is more comfortable and rarely causes pain. Invisalign is also unique in that for a patient who has pain at the beginning of treatment, the clinician can reduce the pain by gradually decreasing the amount of tooth movement with each aligner step. Easy to maintain oral hygiene: The removable nature of invisible orthodontics does not interfere with oral hygiene protection, so poor hygiene is rare. It is now generally accepted that patients who brush their teeth incorrectly or incompletely during fixed orthodontic treatment can develop enamel demineralization, tooth decay or periodontal disease. Patients treated with invisible aligners show low rates of enamel demineralization and caries compared to patients treated with fixed orthodontic appliances. For teeth with fillings or crown restorations: Applying brackets to teeth with fillings and restorations can be a challenge. Although it is possible to cement over crown restorations with hydrofluoric acid or ceramic treatments, this technique requires additional manipulation and the results are difficult to predict. In addition, because hydrofluoric acid is corrosive to tissue, rubber barriers need to be placed for safety when using it. Invisible aligners are ideal for this group of patients because the clinician can determine which teeth do not require bonding attachments, thus reducing or avoiding this operational challenge. No hindrance to articulation: Invisalign aligners do not cover the palate and therefore do not hinder articulation. Saves chairside time: It eliminates the need for brackets, archwires and brackets. It also does not require operations such as the removal of A-traction or C-chain rubber bands, eliminating the need for all the appliances and devices required for fixed aligners. Facilitates vertical relationship control: Invisalign can effectively control open or shallow jaws in the front teeth. The tendency to open jaws, which can easily occur during the initial alignment phase with conventional fixed appliances, can be reduced with invisible appliances. Can be used for deep overjet cases: Misalignments with deep overjet can be treated simultaneously in the upper and lower jaws with invisible aligners, without the use of anterior flat guides or posterior jaw pads. Fewer accidents: Invisible aligners are less likely to cause accidents than fixed aligners. There is no damage to the brackets or irritation of the soft tissues by the archwire, and although patients occasionally lose their aligners or have them damaged, these do not require emergency treatment. In these cases, arrangements can be made for the patient to subsequently receive a re-fabricated aligner. The ability to control the movement of individual teeth: Invisalign is also unique in that the clinician can specify exactly which teeth need to be moved and held still during treatment. With this option, teeth that already have root resorption and have restorations can be kept immobile during treatment. Can replace fixed orthodontics in Phase II treatment: Invisalign is used for patients with all teeth erupting between the second molars on both sides. When a patient has undergone Phase I orthodontic treatment during the mixed dentition period, such as correction of bad habits, jaw misalignment or severe malocclusion, he or she usually becomes bored with fixed orthodontics for Phase II treatment. At this point, once the patient’s permanent teeth have fully erupted, invisible orthodontics can be used for Phase II treatment. For the patient, invisible orthodontics can make a good difference and is an aesthetic option. Control of night grinding: Invisible aligners cover the jaw surface of the teeth and thus act as a protective barrier, thus reducing tooth wear caused by night grinding habits. For special patient groups: Athletes and instrumentalists may choose invisible aligners due to their removability and comfort. Bleaching of teeth during orthodontic treatment: Another function of invisible aligners is the ability to bleach teeth at the same time as orthodontic treatment, so they can provide a comprehensive aesthetic treatment. Early visualization of the orthodontic process: For the first time, invisible aligners are designed to allow clinicians to see a demonstration of the entire orthodontic process from start to finish. In summary, bracketless invisible orthodontics can benefit patients in many ways, not only in terms of aesthetics, but also in terms of making orthodontic treatment more comfortable and easier. Although the technology is still more suitable for simple cases, such as mild crowding or small gaps, its use is expanding as the technology continues to evolve, and there have been successful cases of extractions. If you want to “quietly” become beautiful, then invisible aligners are the best choice for you!