Orthodontics can be done at the age of 34, provided that the periodontium can remain healthy. 1. There is generally no age limit for orthodontic treatment, as long as the patient’s periodontium can remain healthy, he or she can receive orthodontic treatment. However, adult orthodontic treatment is also different from teenage orthodontic treatment. First of all, the growth and development of adult jawbone has been completed, the teeth move slowly, the alveolar bone reconstruction is not active, and it is necessary to avoid excessive orthodontic force to cause root resorption, tooth loosening and so on. 2. In addition, adults often suffer from different degrees of oral diseases, such as caries, periodontal disease, temporomandibular joint disease, etc., which will complicate the treatment and often require multidisciplinary treatment. It is recommended to consult a specialized doctor.