In this phase, the remaining permanent teeth are allowed to erupt. A successful first phase will have created room for teeth to find an eruption path. Otherwise, they may become impacted or severely displaced.
In other words, at the end of the first phase of treatment, teeth are not in their final positions. This will be determined and accomplished in the second phase of treatment. Selective removal of certain primary (baby) teeth may be in the best interest of enhancing eruption during this resting phase. Therefore, periodic recall appointments for observation are necessary, usually on a 3 to 6 month basis.