This removable, functional appliance is a modification of the Schwarz-Appliance. It consists out of two separate plates for upper and lower jaw. The lower jaw plate has an inclined plane, whereas the upper jaw appliance features two protrusive bars to interact with the plane. Both bars are soldered to an expansion-screw with superelastic springs inside.
Statistical measurements in about 300 treated cases demonstrate the superior skeletal influence compared to Activators and Bionators.
Treated cases will be shown and the usage of the appliance will be discussed. The statistical contrast to an untreated Class-II-Group will be demonstrated.