Details.
Usually starts around age 7 to 9, when there is a mixture of adult and baby teeth. Treatment aims to reduce or eliminate developing orthodontic problems and reduce the need for later treatment. It may use the early growth spurt to make difficult orthodontic problems more manageable. Examples include crossbite correction, traumatic bite correction, space maintenance to prevent impacted adult teeth or progression of space loss and crowding, and correction of protrusive upper incisors to reduce the likelihood of trauma. Most early treatments still require a second phase of treatment once the adult dentition is established.