Orthodontic methods are divided into two categories: 1. The first is to correct teeth by restorative means, mainly for localized individual teeth unevenness needing aesthetics, its advantage is that it can be completed in as little as 1-2 weeks. In general, you need to grind some teeth, that is, your uneven teeth, we choose to give it a veneer or porcelain restoration, it is partially grinding small, do a brace, improve its shape and position. But if the deviation from the position is more, this way may not be suitable, to be treated on a case-by-case basis; 2, the second type is orthodontic, that is, we often speak of braces, this way the cycle will be longer, generally need 1-2 years. It is also divided into several categories of methods, the first category is the muscle function orthodontic appliance, generally for small children to break some bad habits, like the more popular MRC is now part of the category. The second category is some movable orthoses, generally in early adolescence, with some movable orthoses for his jaw back or tongue out, lip biting and other bad habits can be broken. The third category is fixed orthodontic appliances, some braces on top of the teeth, which is the most common. With the increase in aesthetic requirements, we now have ceramic braces, where only a wire can be seen on top of the teeth, and invisible orthodontics and lingual braces where nothing can be seen. The disadvantage of this method is that the cost is higher, but the aesthetics are better, depending on the specific indications of the patient.