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Executive | Lab Tech Talk

Fan Type Expander

Category:

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 Bar
  • Expansion Screw

Suggested Materials:

  • Wire: Chromium Cobalt or Stainless-Steel wire
  • Solder: Silver Solder (Cadmium Free)

Options:

  • 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 rst permanent molars All