Interceptive therapy (or phase I) aims to correct predominantly skeletal disharmonies which, if not treated promptly, can evolve and worsen over time. The main objectives of this therapy are represented by: harmonizing skeletal growth, promoting the eruption of all permanent teeth and eliminating any bad habits.
This treatment phase is usually conducted at an age between 6 and 9 years and has a limited duration (around 1 year); subsequently it is followed by a monitoring phase with periodic checks: sometimes, in this time interval, the strategic removal of deciduous teeth may be indicated to speed up or facilitate the eruption of the corresponding teeth permanent. After completion of the trade-in, it is determined whether or not a second treatment phase (phase II) is required.