Problems that will eventually need orthodontic attention can become obvious long before a child has all of their permanent teeth. Depending on the type of problem a child has, Dr. Samuelson may recommend Two-Phase treatment. Two-Phase Treatment means that treatment is done at two different times, often to take advantage of predictable stages of dental development and physical growth. The first phase begins while a child still has a mix of baby and adult teeth. Typically, a resting period follows. Phase two of orthodontic treatment usually begins when most or all of permanent teeth are present, so they can be moved into their final position.