Expansion Appliances

Banded Hygienic Expander Banded Hygienic Expander

·         Two bands or crowns are standard, but a second set of bands or crowns can be added for extra stability

·         Rapid expansion of the mid-palatal suture to guide tooth and arch development

·         Constructed for upper arch

 

 

 

Fixed Lower Expansion Appliance (FLEA) Fixed Lower Expansion Appliance

·         Support arms follow posterior teeth

·         Screw located lingual to anterior teeth

·         Expansion of the mandible to guide tooth and jaw development

·         Constructed for lower arch

 

 

 

Bonded Hygienic Expander Bonded Hygienic Expander

·         Full acrylic coverage on posterior surfaces

·         Occlusal coverage aids in opening cross bites and allows for easier expansion

·         Springs can be added to push anterior teeth into alignment

·         Standard design for upper arch

 

 

 

Haas Expander Haas Expander

·         Acrylic plate and lingual bars exert pressure evenly on the palatal tissue and teeth

·         Two bands or crowns are standard, but a second set of bands or crowns can be added for extra stability

·         Acts to expand palate and tooth position

·         Standard design for upper arch

 

 

 

Schwarz Plate (Removable Expander) 

·         Standard design includes 2 Adams clasps, 2 ball clasps, and labial bow

·         Worn 24/7, except during eating and brushing

·         Can be worn as a retainer when expansion is complete

·         Constructed for upper or lower arch

 

 

 

 

 

Arnold Expander 

·         Bands or crowns can be placed on any posterior teeth the doctor chooses

·         No screw for patient to turn

·         Spring-loaded for constant pressure to induce lateral expansion

·         Can be made passive after expansion is completed

·         Constructed for upper or lower arch

 

 

 

Quad Helix (Ricketts) 

·         Bands or crowns on posterior teeth can be used for rotation, uprighting, or stabilization of posterior teeth

·         Unilateral or bilateral expansion or contraction

·         Allows for differential amount of expansion in anterior and posterior areas (many adjustment points)

·         Constructed for upper or lower arch

 

 

 

Fan Expander 

·         Hinged expansion screw

·         Hinge is centered with midline and located at distal portion of first or second molars

·         Expands anterior section of arch while maintaining molar width

·         Also available in a removable version

·         Constructed for upper arch only