The two parts to a perfect smile represents the two critical phases of orthodontic treatment. The first phase is termed developmental treatment, and the second phase is termed completion treatment. Successful, lifelong results can be realized when both phases are carried out at the proper time. Dr. McSurdy and Dr. Pavlow stress an early intervention approach to the orthodontic treatment process. The American Association of Orthodontists (AAO) recommends that every child be evaluated for orthodontic therapy by the age of seven.