The best age for orthodontic treatment is around three to five years old, but orthodontic treatment can also be chosen at the age of six and a half to seven years old, but the process is often hampered by the replacement of permanent teeth. Usually the method of orthodontic treatment chosen is the maxillary cushion type with hyperbolic lingual spring movable aligner with outside traction, and the front traction generally needs to be worn for a long time so that the bite can be corrected. In addition, if the individual teeth are antinuclear, you can choose to use the bite method, or you can choose to use the upper incisors beveled crown guide or you can also use the maxillary cushion movable aligner. This can correct the pocket teeth in time, even if there is a bony retrusion later can also have a better orthodontic aid effect.