Many friends ask, “When is the best time to start straightening teeth? Do we have to wait until the teeth are replaced? Is it true that you can’t have your teeth fixed when you are over 30? Is it that the elderly should not even think about it? We often encounter various patients in the clinic, some start too late and miss the best orthodontic period; some are worried about old age and give up treatment. So when exactly is the best time to get your teeth fixed? It should be considered from the following aspects. Can I have my teeth fixed before I finish replacing them? If a child is found to have a geodesic, from the time it is found, it should go to the orthodontic department of the hospital. Some geodesic can be corrected by early orthodontic treatment, so don’t wait until the child has finished replacing teeth, go to the clinic as early as possible, even if it is not treated, you can still have a good idea. There are also some bad habits that affect the oral and maxillofacial development, such as love to bite fingers, pens, lips, often spit out the tongue, sleep open mouth breathing and so on, once parents find, should also go to the orthodontics department as soon as possible, so as not to let the adverse effects continue. When is the best time to fix general crowding? If the conditions are suitable, it is best to fix it during adolescence after tooth replacement. Adolescence is the best time for orthodontic treatment because of the active skeletal reconstruction, short orthodontic treatment time and more stable effect if properly maintained. If you miss the adolescence, can you still correct it when you reach middle age? The answer is that it depends on the situation. The main consideration is the condition of the teeth, the periodontal condition, and the whole body. If most of the teeth are healthy, there is no serious periodontal inflammation and no serious systemic diseases, there is generally no age limit. It is just that for adult patients, our treatment plan will be more conservative, the course of treatment will be longer than for adolescents, and the later maintenance will be more demanding. If there are more problems with the teeth, periodontal or systemic conditions, it will require a comprehensive consideration by the orthodontist, combined with the opinions of other specialists, to make the final decision on whether to do orthodontic treatment. The above aspects are the periods of orthodontic treatment for our common types of malocclusion. Of course, the safest way is to go to your nearest orthodontist when you are considering this issue, and to determine whether and when treatment is necessary through a face-to-face meeting with the orthodontist.