Phase 1 treatment is orthodontic treatment for children that have yet to lose all their permanent teeth. It is used to address specific issues such as crossbites, sever crowding, habits such as tongue thrust and finger sucking habits. Phase 1 treatment does not mean future treatment is not needed. It is likely phase 2 treatment will be needed to correct the remaining permanent teeth as they come in. Below are examples of reasons why Phase 1 is needed.