Removable Fan Expander
Used to achieve expansion in the anterior area
RPE
Super Screw RPE
Two-arm RPE
Schwatz Expander
Removable palatal expander that can be designed with or without occlusal bite pads, springs and additional retention options
Three Way Expander
This appliance is used to expand the upper arch in three direction which is bilateral palatal expansion and advancing anterior teeth.
Sugittal Appliance
This appliances is used to achive bilateral expansion and bilateral distalizing movement of posterior teeth
R.P.E. Rapid Palatal Expender
It can be soldered to metal bands or bonded (RPE attached to acrylic bite pads which bond to posterior teeth). These appliances also come in different designs such as regular four arm RPE, two arm RPE, expander fan type RPE
Williams expander
This appliances is used to expand lower arch and also advance anterior teeth
“W” arch expander is “W” shaped arch soldered to bands on sixes and used to provide anterior and/or posterior expansion
Quad or Tri Helix Appliance
This appliance is used to widen the arch and correct posterior cross bite (for narrow palats)