Correction of malocclusion is a process of biological alteration. Retainers are worn for 12-24 months after treatment is completed, with a few patients requiring longer or even lifelong retention. Retainers are designed to consolidate the treatment and are an integral part of orthodontics. Failure to wear the aligners as prescribed by the doctor often results in relapse and a significant reduction in the effectiveness of treatment. At present, the commonly used retainers: 1, fixed retainers. This is the orthodontic retainer in the retention force is relatively stable, but also can take into account the aesthetic, suitable for just remove the fixed aligner use; 2, with wire movable retainer. This orthodontic retainer is suitable for people who have just taken off their aligners and do not have high aesthetic requirements, and need to be taken off in time for cleaning after eating. 3, clear retainer. It is not recommended to use a clear retainer just after taking off the aligner. Clear retainers are least resistant to wear, with a long yellowing time, generally need to be replaced in about a year. In the treatment just completed should wear retainers 24 hours a day, movable retainers removed when eating, a total of 6-12 months to wear. This is the first stage. The second stage should ensure that the retainer is worn every night for a total of 6 months. The third stage requires wearing the retainer every other day for half a day (night or day) for a total of 6 months or more. Some patients need to extend the time of wearing retainers: 1, some mild bony deformities, without surgical treatment, only by moving the teeth to achieve a normal bite, this malocclusion in order to compensate for the skeletal deformity after correction, the position of the teeth are generally more than the normal range, in a relatively unstable position, so it is also easy to relapse. For this malformation, after the completion of orthodontic treatment, it is necessary to wear retainers for life to maintain the position of the teeth. 2.Dental malformations that come to the clinic because of extensive scattered gaps in the teeth, after the completion of orthodontic treatment, the retainer must be worn for life to prevent the re-emergence of gaps. 3, lower front teeth crowded malocclusion, although the teeth have been aligned after orthodontic treatment, but due to the role of occlusal forces, the teeth have a tendency to move forward, located in the front of the teeth of the lower front teeth, under the action of this force, crowding is easy to recur, so it also needs to be maintained for life. 4.Adult malocclusion is difficult to break because of the tissue balance formed over the years. There are many bad habits that are also difficult to break, so it is best to take lifelong retention. If the treatment at the doctor’s is the patient’s passive acceptance of orthodontic treatment, then the wearing of retainers is the patient’s own active orthodontic treatment. Are you wearing them properly as prescribed?