Orthodontic treatment is usually completed in about two years after braces are worn, depending on the difficulty of the malocclusion. Braces are divided into early movable braces and later fixed braces, depending on the specific situation of the teeth. If it is caused by bad habits in childhood, you can wear movable braces for correction, generally speaking, it is three months or six months to complete the correction. If mobile braces do not achieve good results, the second stage of fixed orthodontic treatment can be performed. There are traditional orthodontic treatments and invisible orthodontics. Traditional orthodontics involves bonding brackets to the teeth and then applying some external force to the teeth through archwires to achieve tooth movement. Invisible orthodontics is designed with different transparent braces, which are replaced once every ten days or so, and the braces are used to move the teeth to achieve alignment. This phase is about one to two years. The difficulty of orthodontic treatment is related to age. In the case of children, the orthodontic treatment can be completed in about one and a half years after wearing braces, and in the case of adults, it usually takes two or two and a half years to complete the orthodontic treatment. So wearing braces children about a year and a half to be able to correct completed, adults need about two years.