1, dental pulp maladjustment: Some beauty lovers who have just finished orthodontics may have maladjustment for a certain period of time, so they can adapt slowly for a period of time.

2, the root stress is large: it may be that improper force is used during some post-treatment, resulting in excessive root stress.

3, loose teeth: Generally speaking, when doing orthodontics, the teeth are slightly loose, which is a normal phenomenon. With the end of the whole orthodontic process, the general teeth will gradually stabilize, but it should be noted that if you choose an informal orthodontic mechanism, the wrong orthodontics will be looser and more difficult to recover.