Which of the following is a myofunctional appliance?
Catalans or lower anterior inclined plane appliance is used to treat cross bites. The inclined plane has a 450 angulation, which forces the maxillary teeth in cross bite to a more labial position. It is teeth supported functional appliance. Expansion screw and Derichsweiler are expansion appliances.
Catalan's appliance
Hawley's appliance
Expansion screw
Derichsweiler appliance.