You can still get your teeth straightened at age 40, in fact there is no age limit for orthodontic treatment, usually if the periodontal conditions are good enough for the teeth to undergo orthodontic treatment. In the earliest general case, you can start orthodontic treatment from the healthy jaw, that is, around 3-5 years old you can start with functional trainers. The best age for orthodontic treatment is after the development of the teeth is complete, i.e. around the age of 12. Fixed-phase orthodontics can be done during the permanent dentition, while fixed orthodontics can usually be done around the age of 14. Typically, orthodontic treatment is smoother and less painful when done during the developmental period. There is no age limit in adulthood, and orthodontic treatment is suitable for all ages as long as the alveolar bone is healthy enough and the periodontium is healthy enough. Therefore, orthodontic treatment can still be performed up to the age of 40 and will be successful if you are able to cooperate with the doctor. Therefore, if there is a need for treatment, you can go to the stomatology and orthodontics department for timely consultation.