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EX210 Quad Helix Expander

Appliance Purpose / Function:
The Quad Helix expander is used to expand the posterior segments of the arch, correct bilataral or unilataral cross bites, and help align crowded teeth.

Appliance Components:

  • Bands on the 1st permanent molars
  • Quad helix

Suggested Materials:

  • .036 Blue Elgiloy wire (heat treated)
  • Silver Solder (Cadmium Free)


  • Laser welding (no solder)
  • Face mask hooks
  • Habit crib
  • Archwire Tubes
  • Headgear Tubes

Appliance Fabrication Standards:

  • .036 Blue Elgiloy wire
  • Width between the anterior helicals should accomodate a 3 prong plier
  • The body of the RPE is as high in the palatal vault as possible without touching the tissue
  • Half of the width of the distal helicals should extend beyond the molar band
  • Approximately 4mm of wire should lay on the band for
    soldering or welding
  • Lingual bars should extend to the mesial of the cuspids

Appliance Notes:

  • Orthopli 0640A pliers are designed specifically to make intra oral adjustments on the Quad Helix appliance.

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