FAS uses a unique 3rd generation aligner material to obtain the best tracking.
FAS Soft Track is an optimized material with ideal elasticity for the best tracking. Additional attachments help to control dental corrections in the sagittal plane, crown inclination, rotations, extrusion and torque.
FAS Hard Track is a specific material for corticotomy-assisted arch expansion. The attachments are specific for torque control of posterior teeth while expanding the arch form.