On occasion, younger patients with severe orthodontic problems might need two-phases of orthodontic treatment.
Phase I, also known as Interceptive or preventative orthodontic treatment, usually occurs when the child is still in a mixed dentition (has a mixture of adult and primary teeth). This is usually between the ages of 7 and 11.
Fixed or removable orthodontic appliances, or partial braces may be placed to prevent or correct fairly severe orthodontic problem which would be harder to treat later in life. These problems include severe crowding and tooth misalignment, cross bites, improper jawbone growth or harmony, or facial problems.