The best age for malocclusion correction is in the deciduous tooth period (3-5 years old) and the mixed tooth period (6-12 years old). General malocclusion such as individual tooth misalignment should not be corrected immediately. You should continue to observe and correct bad oral habits. Because in this period, the teeth and jaws are in the adjustment period, with the correction of bad habits, the malocclusion can often be corrected by itself. At this time, the growth and development speed is very fast, and inappropriate correction force will affect the development. However, for malocclusion that seriously hinders growth and development, early correction is required. Such as deciduous teeth crossbite, will hinder the development of the maxilla, affect the appearance of the face, should be treated as soon as possible. If the child cooperates, it can be corrected at the age of 3 to 5 years. Most malocclusions are not corrected until the permanent teeth are replaced, around the age of 12. Because the gingiva of the permanent teeth is gradually developed, and the occlusal relationship between the upper and lower teeth is also adjusted, a clear diagnosis of the type of malocclusion can be made, and corresponding correction methods can be taken. In theory, the best age for children to correct malocclusion is at the peak of their growth and development. Boys are 12 to 14 years old and girls are 11 to 13 years old. However, there are individual differences in the growth and development of each child and cannot be generalized. Correction at the peak of growth and development, short course of treatment, good effect. If you miss this period, the growth and development are still relatively active. Although the difficulty increases, the correction effect is also better.