Many patients wonder why some people can get their teeth straightened in just one year or even six months, while others take two years or more. In fact, the time required for orthodontics varies depending on the dental condition of each individual. Children with minor dental conditions, such as individual teeth backbite, may be able to correct them quickly. Children who have finished replacing their teeth and have individual teeth that are misaligned or have slight gaps are relatively easy to correct and take less time, perhaps about a year to finish treatment. If there is a serious misalignment of teeth or a patient with a particularly protruding mouth, orthodontic extraction may be required to align the teeth and improve the protrusion of the mouth, so treatment will be relatively long, with an average course of treatment taking about two years. Adult patients are the same, but adult patients have more issues to consider than children, including periodontal and dental health, as long as the patient’s periodontal health, adult orthodontics is no problem. Orthodontic teeth is to use a lighter force to make the teeth move, and tooth movement is a slow process, too fast tooth movement is not conducive to the health of the teeth themselves, orthodontic period generally once a month to increase the force, in this month, the teeth have time to move, have rest time. Therefore, we should not pursue fast treatment and let the teeth keep moving to the detriment of the health of the teeth!