Serving your Orthodontic needs since 1990.

EX140 Bonded Palatal Expander

Appliance Purpose / Function:
The Bonded Palatal Expander is an alternative to the banded design featuring occlusal coverage over the posterior teeth. The occlusal blocks coverage eliminates cuspal interference and eliminates rotation of the molars that can occur during expansion.

Appliance Components:

  • Expansion screw
  • Swivel key for activation

Suggested Materials:

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


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

Appliance Fabrication Standards:

  • .036 framework slightly above the height of contour of the posterior teeth
  • Wires should be 1 – 1.5mm off the tissue
  • 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