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Transpalatal Arch

Appliance Purpose / Function:

The Transpalalatal Arch is an excellent choice to maintain space acquired after expansion or distalization. It may be designed as a straight wire crossing the palate between the molars or with an omega loop (co n spring) which will allow adjustment and can provide some molar rotation.

Appliance Components:

  • Bands on left and right side of the arch
  • .036 wire 1mm-2mm o of the palate

Suggested Materials:

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


  • Laser welded (removes the solder)

Appliance Fabrication Standards:

  • The transpalatal wire is a uniform1 to 1.5mm from the tissue across the palate.
  • The con spring of the transpalatal arch is bent with the opening in the coffin spring facing mesial unless otherwise requested

Fabrication Notes:

If the appliance is fabricated with the opening in the coffin spring facing distal, pressure applied on the wire by the tongue will tip the molars forward.