Orthodontics for children is a topic that parents and friends are generally concerned about. Tooth deformity will have a great influence on children's body and mind and need to be corrected in time. Because the child's body is in the period of growth and development, it is relatively easy to correct it. Then let's listen to the introduction of Astor experts. There are mainly the following types: First, the fixed appliance is the most common and widely used appliance, which cannot be taken off by itself and needs to be fixed by a professional doctor, and then it needs to be treated regularly for the next correction, which is one of the common dental appliances for children; Then there are movable appliances, which are usually used to correct simple mistakes and deformities of deciduous teeth and dentition, or fixed appliances, so they are more convenient than fixed appliances. There is also a functional sedan chair, which is mainly used for children who are still at the peak of their growth and development during or just after tooth replacement. Functional orthosis can correct skeletal malocclusion. Because children's orthodontics generally takes a long time, about one to two years, it is necessary to follow the guidance of doctors in order to obtain better orthodontic effect.