The active phase of orthodontic treatment is when the teeth move into place and the bite is aligned. During this stage, thin and soft wires are used to achieve initial alignment and correct crowding and rotations. This is when you will see the most significant changes in your smile. The active phase typically lasts 2 to 3 weeks, after which a “rapid maxillary expander” is placed and left in place for 6-9 months to preserve the correction.
Lower arch decompensation may also occur during this period. After the active phase, a retention phase follows to keep the teeth in their new positions.