Qingming, the temperature rises, it is a good time for spring plowing and planting, so there is a “Qingming before and after, planting melon point beans,” said. How can parents arrange their children’s orthodontic time? How do adults plan their orthodontic treatment? There are two sets of teeth in a person’s life, i.e. milk teeth and permanent teeth. 2.5 to 3 years old, milk teeth come out, permanent teeth start to erupt at the age of 6, and around the age of 12, all the teeth in the mouth are made up of permanent teeth. Therefore, there are 3 important time periods that affect the alignment of teeth. Shanghai Jiao Tong University School of Medicine Affiliated Ninth People’s Hospital Orthodontics Pan Xiaogang Inner Mongolia a machine hospital stomatology Li Wenbo 7 years old children are in the period of tooth replacement, the first molar, also known as the “six age” has erupted, the incisors began to replace. At this time we can roughly determine the child’s growth and development trend, if found to have spit tongue and other bad habits can be corrected in a timely manner, to prevent further aggravation of malocclusion due to bad habits. If the child has respiratory disease, it will also affect the normal development of teeth and jaws, so it is necessary to consult the doctor in time and timely treatment. Therefore, children should see an orthodontist before the age of seven. At the age of 11, most of the baby teeth have been replaced, which means that most of the teeth in the mouth are permanent teeth, and the body is at the peak of growth and development. Jaw problems, such as underdevelopment of the lower jaw, can cause the upper teeth to protrude and are often thought of as “buck teeth”. Functional orthodontic appliances can be used in time to promote the growth of the lower jaw, which usually requires 1 year of treatment. After 1 year of functional orthodontic treatment, the relationship between upper and lower jaws is harmonized, and the permanent teeth are all in place, then the teeth can be aligned with fixed orthodontic appliances, which is also conducive to the maintenance of the effect of functional orthodontic treatment. At the age of 15, the permanent teeth have come in and a stable occlusal relationship has been established. Usually, when a child enters high school, orthodontic treatment usually takes more than 2 years, and it is almost time to finish the treatment before the high school entrance exam. This is the best time for fixed orthodontic treatment. In the case of a child with a “circumcised” bite, we need to determine the cause of the “circumcised” bite. If the cause is simply due to the alignment of the teeth, treatment can be done early to remove the backbite, and around the age of 5, the child will be more cooperative, and the backbite of the milk teeth can start to be corrected. If the cause is due to underdevelopment of the upper and lower jaws, simple orthodontic treatment cannot completely solve the problem. Due to growth and developmental factors, there are many uncertainties in treatment. There are 2 options for this case: one is active treatment, for underdevelopment of the upper jaw, anterior traction devices can be worn to promote the development of the upper jaw. This is usually done around 9 to 11 years of age. The other is a surgical one-time solution. For overgrowth of the lower jaw, there is basically no definite way to inhibit the overgrowth of the lower jaw since the lower jaw is always functionally active, and in some cases, the use of chin pockets only changes the direction of growth of the lower jaw, which may elongate the shape of the face. This condition needs to wait until 18 years of age when growth and development is basically completed for orthognathic surgical treatment, preceded by preoperative orthodontic treatment. At the same time, parents should consider another factor, before the age of 18 is an important stage of children’s learning, facing various pressures such as promotion. Orthodontic treatment requires frequent follow-up appointments and often requires time off work, which interferes with classes. Wearing orthodontic appliances can cause discomfort, and in some cases can affect a child’s concentration and sleep. The point is that learning cannot be delayed. In the absence of particular psychological stress, children focus their main efforts on their studies. At this time, if the orthodontic treatment to achieve some therapeutic effect is also to relieve the child’s image of their own psychological pressure. Therefore, many parents choose to start orthodontic treatment after the child’s high school entrance examination is also a very wise choice. With the increasing demand for appearance and the pressure of competition, more and more adults start orthodontic treatment. College students have ample and flexible time for orthodontic treatment, and those who missed orthodontic treatment as children can be actively orthodontic at this stage. Starting freshman year of college, orthodontics ends in about 3 years, and next just in time to start looking for a job. If you graduate from college and work at the age of 22 to 23, you will not have so much time for orthodontic treatment, and it will be very inconvenient for you to take leave from your workplace to go to the hospital for follow-up treatment. 23 to 26 year old women who want to have orthodontic treatment need to pay special attention to the fact that they need to think carefully about whether to undergo orthodontic treatment if they have any plans to get married or have children in the last 2 to 3 years. Because adult orthodontic treatment takes 3 years, sometimes the treatment time may be prolonged due to a variety of uncertainties, wearing orthodontic appliances will affect the wedding activities, should be negotiated with each other when to correct. In addition, if you are pregnant during the treatment process, due to changes in body hormone levels during pregnancy, coupled with the increased difficulty of periodontal care in orthodontic treatment, it is easy to cause redness and inflammation of the gums. Adult orthodontics is not too late, except for some social factors, only timely start treatment. To summarize a few key time points to see an orthodontist, 7 years old, 11 to 12 years old, 15 years old, 18 years old.