After the braces are removed, the teeth have achieved the expected effect, but they are not stable enough, and it is easy to relapse without retainers. Although the teeth moved to the ideal position at the end of orthodontic treatment, the changes of fibers and ligaments are not over yet, and it will take some time to return to normal, which needs to be maintained during this period. Therefore, at this time, orthodontists need to work closely with Biomice, ask to wear retainers, and come back regularly to check whether the retainers are worn according to the doctor's advice.