3 Way Expander


The 3-way screw is designed for both widening and lengthening the arch, with the anterior section directing forces forward via the incisors. An alternative design uses three distinct screws: one for widening and two in the sagittal plane for posterior distalization. For optimal retention, Adams clasps on the 6’s (if present) and ball clasps between premolars are recommended. Additional features include a labial bow for anterior control and a posterior bite plate, bolstering anchorage for the upper appliance.


Appliance Components

  • Adams clasps on the 1st molars
  • Ball clasps between the 1st and 2nd bi-cuspids
  • Three-way expansion screw
  • Acrylic Plate
  • Posterior Bite Plate

Suggested Materials:

  • Wire: .028 Stainless Steel Adams
  • .032 Ball Clasp
  • Three-way screw (flat): Leone A0932-13