Early adolescence, or between the ages of 10 and 14, is widely accepted as the ideal time to get orthodontic appliances. This is because preteens and younger teens have all their permanent teeth in place, and the jaw tissue is still malleable enough to be repositioned. Most orthodontic treatments are done when the patient has no baby teeth left, as it would be a waste of time to move teeth that will eventually be lost. Orthodontists usually recommend braces for children between 10 and 14 years old. This is when all the permanent teeth have emerged in the jaw, and the bones and tissues are still maturing, making it easier to move the teeth into position in a shorter period of time.
It's also beneficial to leave space for permanent teeth before they have fully come out. However, many people have misconceptions about when is the best age to get orthodontic treatment.