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Habit Crib with Rake


Appliance Purpose / Function:

This appliance can be used for both tough and thumb habits which can prove invaluable for patients who occasionally substitute one habit for the other during treatment therapy. This can also be a good appliance when dealing with an aggressive habit.
Attention: In order to achieve proper function of this appliance a lower model is required for manufacturing


Appliance Components:

  • Bands on the 1st permanent molars
  • .040 base arch extending mesial to the middle third of the cuspids
  • Habit crib is adapted close to the tissue in the rugae portion of the palate Wire and crib are soldered to the bands

Suggested Materials:

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


  • Laser welding (no solder)
  • Appliance may be made more aggressive for more persistent habits


Appliance Fabrication Standards:

  • The base arch slightly o the tissue
  • The base arch touches all the posterior teeth
  • The wire placed at the top 1/3 of the band and laying against the band for 4 to 5mm
  • The vertical arch 1 to 2mm above the height of the cuspids
  • Crib wire is adapted close to the tissue in the rugae portion of the palate with the spikes of the rake bent posterior. Doctor might want them sharp or blunted.
  • Check for interference of the rake and apposing arch.
  • If you have no lower arch, the base wire extends no further than the mesial 1/3 of the cuspids If you have a lower arch, the crib will be as far forward as possible

Appliance Notes:

If the habit persists, it may be helpful to determine whether the habit is a simple habit or a mechanism to help the child cope with stressful events happening in his or her life.