Orthodontics can be done after a week to a month of tooth extraction, depending on the number of teeth that need to be extracted for orthodontics and the trauma of the procedure. If the extraction of the lower jaw central incisors or the two upper jaw premolars is required alone, the extraction sockets will basically heal in about a week, and you will be able to bond brackets, attachments, etc. on the labial side and wear aligners. If orthodontics requires the extraction of four premolar teeth in the upper and lower jaws, the pain caused by the trauma can be relieved in about two weeks and the orthodontic appliance can be fitted. If the patient has four wisdom teeth at the same time, some wisdom teeth are buried and obstructed, the gums must be cut to remove the alveolar bone and split the crown before the wisdom teeth can be extracted, and the swelling caused by the trauma is obvious, causing difficulties in chewing and eating, and it takes about one month for complete healing before the orthodontic appliances can be worn.