Serving your Orthodontic needs since 1990.

EX115 Fan Type Expander

Appliance Purpose / Function:
The Fan Type expander is an all metal expansion appliance typically providing sutural separation. This expander provides 7mm or 9mm of symetrical  expansion to the anterior segment with minimal expansion in the posterior.

Appliance Components:

  • Bands on the 1st permanent molars
  • .040 lingual bars
  • expansion screw

Suggested Materials:

  • Wire: Chromium Cobalt wire Solder:
  • Silver Solder (Cadmium Free)


  • Laser welding (no solder)
  • 7mm or 9mm of expansion

Appliance Fabrication Standards:

  • Lingual bars extend to the mesial of the cuspids unless requested otherwise
  • The body of the RPE is as high in the palatal vault as possible without touching the tissue
  • The RPE is aligned with the midline
  • The body of the RPE should be no further distal than the middle of the first permanent molars

All information is from