Anterior milk teeth, commonly referred to as “enamel”, is a common malocclusion in children. Normally, when teeth bite together, the maxillary front teeth bite on the labial side of the mandibular front teeth. In the opposite case, the lower jaw front teeth bite on the outside of the upper jaw front teeth. In severe cases, this is characterized by a sunken midface and a thickened lower lip. Factors that may lead to malocclusion include: genetics, underwear of the milk cusp, bad oral habits, bad feeding posture, etc. The presence of anterior milk teeth should be corrected as early as possible if the child can cooperate. Through early orthodontic treatment, most of the children’s deformities can be interrupted or reduced, and the concave facial shape can be improved. Of course, due to the complex pathogenesis of anterior teeth, in some cases the growth trend is unpredictable, and some children may need to continue orthodontic treatment after tooth replacement, and individual severe bony anterior teeth require orthognathic surgery in adulthood. The goal of orthodontic treatment is to restore the normal occlusal position and improve the facial shape; to release the anterior teeth and promote the development of the upper jaw. The best time for orthodontic treatment is around 4 years old, and the course of treatment is usually 3-6 months.