What is Phase I and Phase II treatment?
Phase I, or early interceptive treatment, is limited orthodontic treatment (i.e. expander, Herbst, Facemask, headgear, or partial braces) before all of the permanent teeth have erupted. Such treatment can occur between the ages of six and ten. This treatment is sometimes recommended to make more space for developing teeth, correction of crossbites, overbites, underbites, or…