Many parents often ask the question, “At what age should children be seen by an orthodontist?” The American Academy of Orthodontics recommends that children should have a routine orthodontic examination by age 7. Why is 7 years old the age limit for an orthodontic examination? There are two main reasons: one is that the six-year-old teeth (the first permanent molars) have already erupted, the posterior teeth bite relationship is established, and can judge the anterior-posterior and left-right relationship of the upper and lower jaw teeth, and timely evaluation of the lower jaw for functional displacement; the second is that the permanent front teeth begin to erupt, the teeth are not aligned, crowding, deep bite and facial asymmetry and other problems have been expressed. Many people may ask: “Why not wait until all the teeth erupt and align them at once?” For many cases this is not a bad solution. However, there are some dental problems that, if detected early and corrected in a timely manner, can achieve twice the result with half the effort. Many parents believe that orthodontics can only be done when all of their child’s permanent teeth have erupted, so much so that the best time for orthodontics is missed, making it more difficult to correct, affecting the final outcome of orthodontics and complicating the problem. Early orthodontic treatment has the following advantages: ① brighten the smile of the child and enhance the child’s self-confidence; ② eliminate the limiting factors and allow the jaws to grow and develop in a normal way; ③ reduce the possibility of extracting teeth after tooth replacement; ④ reduce the chance of having to be treated surgically due to the serious development of malocclusion; ⑤ correct bad oral habits; ⑥ coordinate the width of the upper and lower arches; ⑦ simplify and shorten the course of treatment; ⑧ enhance the stability of the final treatment result (vii) simplify and shorten the procedure; (viii) enhance the stability of the final outcome; (ix) improve pronunciation; and (x) guide the normal eruption of teeth. Another question about early orthodontic treatment is: “Will I need more treatment later?” For most cases, the answer is yes. Because the permanent teeth are not fully erupted at the time of early orthodontic treatment, the doctor cannot ensure that the teeth that will erupt later are aligned in the ideal position. However, early treatment can simplify the second stage of orthodontics, shorten the course of treatment, reduce the possibility of tooth extraction, and result in the most desirable and stable final orthodontic outcome. In conclusion, early orthodontic examination can identify those malocclusions that need to be corrected in a timely manner before all permanent teeth erupt. Even if no problems exist, early consultation allows parents to understand the status of their child’s oral health and remove any inner doubts. Therefore, if you are a responsible parent, it is necessary to take your child for an early orthodontic examination.