For orthodontics, the treatment effect is better for people who are young and have good oral conditions, and the treatment difficulty will generally increase gradually as they get older. Generally speaking, primary and secondary school students are in the best time for orthodontics, boys 12-14 years old, girls 11-13 years old is more appropriate, miss the best time for children orthodontics, when the child is older and then orthodontic, it is possible that the difficulty will increase. So children orthodontics to early, and the winter holidays is a good time for orthodontics, on the one hand, can easily help children through the orthodontic adaptation period, and because of the time, can make the orthodontic appliance to minimize the impact on the child; on the other hand, the child after the holiday orthodontic, teeth gradually become neat and beautiful, self-confidence is also strengthened, to better meet the arrival of the new semester.