It’s a dream come true for countless people to be able to smile and have straight, bright white teeth. In reality, many people suffer from malocclusion, and it is also more common in children. In addition to common local factors, such as: variation in the number of teeth, abnormal tooth size or shape, abnormal lip tie, early loss of milk teeth or permanent teeth, etc., there is another element that is easily overlooked: genetic factors, and the influence of genes actually occupies a considerable proportion in the pathogenesis of malocclusion. When it comes to genetic influence, it is mainly divided into two aspects: one is the congenital incorrect proportion of the size of the teeth and the maxillary or mandibular bone, either the teeth are larger and the jawbone is smaller, resulting in crowded teeth arrangement; or the teeth are small and the jawbone is large, and there will be gaps between the teeth, both of which will cause the symptoms of malocclusion to appear. On the other hand, the size or shape of the upper and lower jaws are not in the right proportion. For example, if the lower jaw is larger, it is likely to cause the front or back teeth to bite wrongly. In addition, single or multiple missing teeth may cause the neighboring teeth to fill in the position, abnormalities in the shape of crowns (such as conical lateral incisors), and the emergence of supernumerary teeth that affects the existing dentition, etc., which all may result in a malocclusion. A malocclusion not only affects the appearance of the teeth, but may also cause difficulty in chewing and lead to malnutrition, which may require the help of an orthodontist. In such cases, parents are advised to seek early detection and early treatment. For example, some children are born with “bony buck teeth” or “bony pockets”, and it is recommended that parents discuss treatment with an orthodontist right after the child emerges from the teeth, so as to achieve the effect of early treatment. However, if the teeth are not straight and the face and bones grow normally, you can wait until after 12 years old to go for orthodontic treatment. If you are worried, you can go to the orthodontist to consult for a phased treatment when the 8 incisors come out. Of course, in order to have healthy teeth, the most fundamental way is to develop a good habit of brushing, especially if children can develop a correct way of brushing since childhood, it will be useful for the rest of their lives. In addition, half a year of regular cleaning to reduce the incidence of tooth decay, in order to always keep teeth healthy and beautiful. In 1990, I became the first postgraduate student of orthodontist Prof. Wang Bangyan, and in 2002, I cooperated with the Department of Mechanics of Tsinghua University to carry out the research of digital reconstruction of dental and jaw models, and became a member of the pioneering invisible orthodontic technology in China. At this stage, my main research direction is craniofacial 3D digital reconstruction and domestic invisible orthodontic technology development. If you have any doubts about orthodontics, you can ask me questions and I will answer them all.