There is no optimal age for buck teeth correction, usually buck teeth correction is categorized into buck teeth correction for children, buck teeth correction for teenagers and buck teeth correction for adults. Buck teeth can be corrected from the age of 3 to about 12 years old, and it is better to correct the buck teeth of adults before the age of 40 years old. 1. Buck teeth correction for children: During the period of milk teeth, some children usually have habits such as lip-biting, finger-sucking and mouth-breathing, which may lead to malocclusion, and should be corrected in time when parents find them. If there is a case of buck teeth, it is better to start correcting it at around 3 years old after the children’s milk teeth grow up. 2. Teenagers buck teeth correction: If the buck teeth appear during the permanent teeth, usually at the age of 12 or so can be corrected. At this time, the jaws of teenagers are still in a stage of rapid growth and development. Orthodontics also needs to take advantage of the growth and development potential of the jaws to ensure tooth movement and alveolar bone reconstruction. 3. Adult Buck Teeth Correction: Usually, adults with buck teeth can also undergo orthodontic treatment. However, the effect of orthodontic treatment diminishes with age, and combined orthodontic and orthognathic treatment may be required to obtain better results. Buck teeth, if left untreated, can cause abnormal development of the lower or upper jaw bones, long jaw or inability to close the lips due to deep coverage of the upper front teeth, thus seriously affecting the development of the face. Therefore, buck teeth need to be corrected in time.