There are always adult patients who come in and ask, “I’m 20 years old, is it too late for orthodontics?” “Is it too late to get orthodontic treatment because my teeth are falling out early?” In order to dispel the doubts of the majority of beauty lovers, I make answers to some common questions. In fact, adult orthodontic treatment has its advantages, adults have a strong will to orthodontic treatment, good cooperation (timely follow-up, careful diet, some auxiliary devices to wear, good oral hygiene), so the course of orthodontic treatment is not necessarily longer, sometimes even shorter than children, orthodontic treatment will be better. The risks of adult orthodontics are mainly focused on: adults often have periodontitis, if there is mild periodontitis, it does not matter, first go to periodontics treatment, after the inflammation control and stability, then orthodontic treatment, while regular periodontal review during the orthodontic period, you can ensure safe orthodontic treatment. There is also a common risk of adult orthodontic treatment: temporomandibular joint disease (TMD), in fact, it is a common disease, the incidence of 70% in the population, common symptoms are: joint popping, open mouth type has changed, severe cases of acute attacks and even open mouth restricted, preauricular pain, affecting daily life. In more severe cases, condylar resorption occurs. The above symptoms may occur before or during orthodontic treatment or during the maintenance period after completion of orthodontic treatment. Some orthodontic treatment can be performed after six months of symptom relief and stability after treatment of the joint. If TMD occurs during treatment, it may be possible to suspend or discontinue the force for a period of time and continue orthodontic treatment after it has resolved. In the case of ICR, the timing of orthodontic intervention will be determined by monitoring systemic hormone levels and observing the stability of the occlusal relationship. In adults, the crowding of the front teeth is often seen as a “black triangle” after alignment, mainly due to the overlapping of the original teeth and the absence of gums, but after alignment of the teeth, the gums do not grow up due to the contact between the teeth. The usual treatment method, through the adjacent surface de-glazing, the interdental point contact will be adjusted to grind the surface contact, reduce or even eliminate the “black triangle”. There are many invisible orthodontic models to choose from, ceramic brackets, Invisalign (angel braces), lingual orthodontics, and all of the above invisible orthodontic treatments have been developed and are suitable for all types of extraction/non-extraction orthodontic cases. We hope that more and more adults will take this step towards orthodontics and have healthy and beautiful teeth for life.