In general, the expansion plate is used at the beginning of a treatment to create space in the upper jaw by expanding the palate.
This appliance can also make tipping movements such as moving a tooth forwards that is trapped behind the bite.
It is most commonly used for interceptive treatment on young patients who are not yet ready for a comprehensive correction
but needs some early intervention to prevent other problems developing.
The plate is to be worn 22 hours per day and removed only for eating and cleaning.
1965 Savièse
