The Forsus appliance is used in order to help move the upper molars back while moving the lower arch forward. Composed of a spring coil rod, the appliance is used while a patient is currently wearing braces. It runs from the upper first molar band down to the lower archwire.
The Forsus appliance works like elastics (rubber bands) but with more efficiency and effectiveness and without the need for patient compliance. Treatment time is often dramatically reduced, as well as a significantly reduced need for elastics wear.