The four most common diseases in oral diseases are: malocclusion, dental caries, periodontal disease and temporomandibular joint disease, and if malocclusion is not treated in time, it will aggravate the latter three diseases. Orthodontics is a branch of dentistry, which studies the etiology, prevention, treatment and facial coordination of misaligned tooth deformities, such as crowded misalignment of teeth, bad bite, protruding and sunken mouth shape, etc. A great part of dental, jaw, and craniofacial incongruities are caused by congenital genetics and acquired environment during the growth and development of children, and most of them can be resolved by orthodontic methods. The genetic factors are mainly due to the increase of brain volume and the deterioration of chewing function caused by the increase of brain volume during the evolution of the race, and the incongruity of the jaws becoming smaller while the number of teeth remains unchanged. Acquired environmental factors are mainly: early loss of milk teeth, multiple teeth, congenital missing teeth, lagging milk teeth, insufficient wear of milk cusp teeth and other factors. The principle of orthodontics is that the teeth move under the force, and the jawbone and TMJ are altered under the force, so as to achieve a stable balance of teeth and jawbone under the new position, and achieve the aesthetic coordination and health of the face, so orthodontics is the unity of science and art. Who needs orthodontics? As the gateway to the digestive tract, well-aligned teeth not only have good biting and chewing functions, but also contribute to dental cleanliness, clear speech and aesthetic appearance. The incidence of malocclusion in China is as high as over 90%, and the majority of children have different degrees of malocclusion. If we look at the high standard, such patients all need orthodontic treatment. The choice of orthodontic treatment depends on how much parents care about their children’s beautiful smile, because the dynamic beauty of the face and the infectiousness of the smile are mainly determined by the lower 1/3 of the face, which is reflected in the coordination of the lips and teeth. The teeth are the support of the lips, and orthodontics moves the teeth to change the crowding and protrusion of the teeth, the buccal gap, and the golden ratio of the horizontal diameter of the front teeth to show a more full three-dimensional and vivid smile expression of human beings. There are even many parents who think: as a modern city kid, you can’t be a city kid without orthodontics. So when is the most appropriate time to do orthodontics for your child if it is so important? Many parents have a common feeling when they come to the hospital because of their limited knowledge of malocclusion, how beautiful their children’s teeth are before tooth replacement, but problems arise during tooth replacement, and general dentists instruct them to come for treatment after tooth replacement, thus missing the best time for orthodontic treatment, or even the need for surgery in serious cases. The best age for orthodontics in general is around 12 years old. At this time, the child’s entire dental arch is fully developed and the orthodontist can make a clear diagnosis of the type of malocclusion and adopt the appropriate orthodontic method. In fact, early intervention is needed to treat cases that begin during the milk teeth period when bad habits such as “enameled teeth”, open mouth breathing and lip biting cause jaw development to become more and more serious as they grow. Abnormal tooth eruption and occlusal interference leading to malocclusion are most likely to occur during the replacement process of the permanent teeth. These problems require the removal of these bad habits at an early age to get rid of the potential hazards in a short time, block the abnormal jaw development, reduce the need and difficulty of later orthodontic treatment, reduce the extraction rate and side effects in orthodontic treatment, and avoid orthognathic surgery in adulthood. Therefore, it is recommended that children need regular checkups by specialist orthodontists at the age of 3 to 9 years old to observe whether the jaws are developing normally and to inform interventions to help the teeth erupt to normal positions. In addition, the bone alteration speed is fast and plasticity is high at that stage, giving the teeth and jaws a good environment to grow to the correct position by themselves and be more stable. Guangdong, in particular, is a high incidence of rhinitis, many children due to respiratory obstruction caused by narrowing of the dental arch, the upper jaw protrusion and other “adenoid syndrome” face, more need for early detection and intervention. Early preventive orthodontic treatment is relatively inexpensive and less prone to the possible side effects of the orthodontic process. At the same time, children regularly visit the hospital for dental checkups and develop the habit of seeing and caring for their teeth from an early age. Orthodontics is the most specialized discipline in dentistry, and preventive orthodontic treatment for children has a long observation period and requires more foresight. Choosing a pediatric orthodontist with extensive experience in long-term follow-up and treatment is more assured. It is easy to align the teeth, but to protect the health of the teeth themselves and to ensure aesthetic and therapeutic stability requires years of accumulated expertise by the orthodontist’s hand. The significance of early oral prevention Oral health is an important factor in ensuring general health and quality of life. Children are growing and developing, and poor teeth will affect their nutritional intake, growth and development, speech and pronunciation, image and self-confidence. The United States has one dentist for every five people, and one dentist in China is responsible for the oral health of 30,000 people, with a per capita dental spending of$2. These data comparisons fully illustrate the importance of oral prevention in the United States. Oral prevention is an investment with low investment and the highest return rate. In an idealized future, dentists should focus on prevention, with doctors’ primary task being to give prevention to every citizen and only a few doctors performing simple treatments. The story of the three magpie brothers in the Spring and Autumn period is a vivid testament to the importance of early treatment. Compared with the magpie who was good at “treating serious diseases”, the elder brother who was good at “treating future diseases” was obviously more skilled. The concept and significance of early orthodontics How to make the best orthodontic effect in children? Lao Tzu said: “The Way of Nature”. My understanding is to follow the power of nature. The modern human misfit deformity comes from the unnatural external environmental changes caused by fine food and bad habits. Montessori’s philosophy emphasizes: love and freedom. But love and freedom without limits can have many to negative effects, children have to learn rules in love and enjoy freedom in rules. The same goes for teeth. The best treatment plan should be to establish a good balance of dental and jaw environment with the help of external forces, and to release the natural growth of teeth in a good environment. Meanwhile, Waldorf’s natural homeopathic concept, with the help of tiny external stimulation, awakens the body’s natural balancing mechanism and growth potential, thus activating the body’s own great restorative capacity and rebuilding the balance of strength in the jaw and face to achieve natural, soothing and stable orthodontic results. Doctors are not God and do not know the best position of teeth and jaws. What doctors have to do is to create a good environment, let the natural forces work, establish a good dental and jaw environment in the balance of forces, release growth in a good environment, and let children have beautiful, neat and healthy teeth in their natural growth. As a pediatric orthodontist, the happiest thing is to see children with beautiful and attractive teeth, to watch them grow up, and to keep the same young and aggressive naked heart as they do.