In the consciousness of many parents, orthodontic treatment must wait until all permanent teeth have been replaced. In fact, for some malformations, if they can be treated at an early stage, they can achieve twice the result with half the effort in a shorter period of time with simple braces and orthodontic methods, while also promoting the normal development of the child’s oral and jaw systems and the healthy psychological growth of the child. A. What does early treatment include? 1, the impact on children’s facial development and aesthetic deformities, including anterior anterior teeth (commonly referred to as the ground), jaw recession (commonly referred to as small chin), maxillary protrusion (commonly referred to as the sky), facial obliquity, etc.. These deformities have a significant impact on the aesthetics of the face and may also have a psychological impact on the child, such as a lack of smiling, a sense of inferiority, and a reluctance to interact with others. Early orthodontic treatment can restore the normal jaw and facial skeletal structure of the child and restore the child’s self-confidence and smile, while also avoiding the development of serious bony deformities in some children later and the need for surgical treatment. 2.Disorders of tooth replacement In the process of replacing the baby teeth and permanent teeth in children, a variety of reasons can lead to abnormal eruption of permanent teeth, resulting in malocclusion, which also requires early treatment. These cases mainly include the treatment of missing retainers for premature loss of milk teeth or permanent teeth, the eruption of permanent teeth and the corresponding retention of milk teeth, the treatment of premature or delayed eruption of permanent teeth, the early treatment of abnormal position of permanent teeth eruption, the treatment of multiple teeth, etc. In clinical practice, we often see children with severely twisted maxillary incisors or buried in the jawbone, which seriously affects the alignment of other teeth and facial beauty. 3, bad oral habits Children have bad oral habits such as tongue spitting, finger sucking, biting, open mouth breathing and lateral chewing due to psychological and nasal airway diseases. These bad habits can lead to abnormal development of dental arch and jaw bone, and aggravate with the duration of the habit. If your child has these problems, it is also important to go to orthodontics for early orthodontic treatment as early as possible to stop the development of malformation. Second, the timing of early treatment Treatment of the milk teeth period, around 4 years old (3.5-5.5); treatment of the replacement period usually begins around 8 years old.