Children from about 6 months of age the first milk teeth erupted, to about 12 years old permanent teeth replacement is completed, this period, the teeth and face are in constant change, whether the teeth can be arranged to the normal anatomical position, by the influence of a variety of factors and interference, timely detection and stop these unfavorable factors on the teeth and facial impact, early guidance teeth back to the normal position,. Nowadays, most parents believe that misalignment needs to wait until the teeth are replaced before orthodontic treatment can be carried out, and this view often leads to some children missing the best orthodontic treatment period, which affects the normal development of the face, and after the teeth are replaced, even if the teeth are orthodontically treated, the facial shape often does not get a good change. Parents are advised to bring their children to the pediatric dentistry department for regular checkups to detect problems and treat them early. Early consultation is recommended when children have the following problems: 1. Diastema Normally, whether the child is in the milk teeth or permanent teeth, the teeth should be outside of the upper teeth when they bite normally, and the opposite is true for children with diastema. There are two reasons for the appearance of ingrown teeth, one is genetic, if the child’s parents, grandparents, parents’ siblings or their children have similar conditions, genetic inheritance is more likely, if there are no genetic factors, then it is possible that they are acquired later in life, for example, poor feeding posture, poor forward jaw habits can cause ingrown teeth. The most obvious difference between a child with clubfoot and a normal child is that the former has a flat or sunken midface and an anteriorly protruding lower jaw, caused mainly by the development of the upper jaw being restricted by the lower jaw. When a diastema is detected in early childhood, it is generally recommended that the child undergo orthodontic treatment for a diastema between the ages of 4 and 4.5 years, where a removable ‘brace’ is placed in the mouth, and treatment usually lasts 3-6 months. After the end of the treatment of milk teeth, to the replacement of teeth, part of the child will be replaced by a normal bite, part of the child will also be replaced by the ground, these children need the second phase of treatment, the timing of treatment varies from person to person, you need to find a professional pediatric dentist or orthodontist for consultation. 2, bad oral habits Some children unknowingly form bad oral habits in life, such as finger sucking, biting the lower lip, mouth breathing, lateral chewing, etc. Some habits can be regarded as normal physiological activities before the age of 2 to 3 years old, usually above 4 years old still can not disappear on their own, still continue, there may be teeth protrusion, poor bite, poor pronunciation and other situations. Long-term bad oral habits can seriously lead to abnormal bone development in children. It is recommended that parents actively guide children to change bad habits, if they cannot change on their own, they can go to pediatric dentistry for treatment. 3.Premature loss of milk teeth Children with serious dental caries often lose their milk teeth early before the age of tooth replacement, some parents still think it is because their children change teeth early and do not go to the hospital for consultation. It is recommended that parents actively treat decayed teeth, extract those teeth that are no longer treatable, and wear gap retainers to prevent abnormal eruption of permanent teeth. There are many other cases that need early orthodontic treatment, so I will not list them here. Summer is the best time for children to have dental treatment, especially those who need orthodontic treatment, and use the summer to get used to the discomfort of the aligners without affecting the child’s schooling, eating and sleep quality after school. Parents are advised to be able to use the summer to check and treat their children’s oral problems early to be able to give their children a healthier and more meaningful summer vacation.