At 27 years of age, as long as there are no contraindications to orthodontics, it is possible to straighten. However, the period of correction is a little longer. If you are 27 years old and want to straighten your teeth, you first need to go to a regular dental hospital for a radiographic examination to determine whether there are contraindications to orthodontic treatment based on the condition of your teeth. It is not recommended to do orthodontic treatment if you are in the active period of periodontitis, or suffering from chronic wasting disease, mental illness, serious blood disease, etc.. If there are no contraindications to the above, then people at the age of 27 can have orthodontic treatment. However, the period of orthodontic treatment is longer and the time for wearing retainers after the orthodontic treatment is over will be increased. In conclusion, the possibility of orthodontics for the group of 27 years old depends on the fulfillment of indications without contraindications.