3 Way Expander

The 3-way screw is used to widen and well and lengthen the arch. The anterior section will drive forces forward using on the incisors. Alternatively, we can incorporate three individual screws, one to widen and two following the sagittal plane to distalize the posterior section. As with any expansion appliance, we recommend maximum retention with Adams clasps on the 6’s (if erupted) and ball clasps between the pre-molars. You can also incorporate a labial bow to control the anterior incisors and a posterior bite plate to disarticulate the arches providing additional anchorage for the upper appliance.

Category: Arch Development Tag: Upper


Treatment & Care

The unique 3-Way Expander features three independently expanding sections in one housing — for transverse as well as sagittal anterior development. Each section can be independently activated. When an equal amount of lateral development is desired, turn the two lateral sections at the same time. If a differential amount of lateral development is needed, by turning one of the lateral sections, the rest of the appliance will act as an anchorage unit — making unilateral movement possible. This is an excellent appliance when the size of the palate is large enough to handle the dimension of the screw. Due to its considerable bulk, however, it is not suited for narrow palates or younger patients.

It is also important that you take very good care of your teeth and gums while in treatment. Food particles and plaque can easily gather around the Expander. Please remove your appliance and brush it every time that you brush your teeth. Poor oral hygiene can lead to cavities, decalcifications (permanent scars on your teeth) and gum disease. We want your experience to be a healthy one, so please spend extra time brushing and flossing your teeth. Please remember to continue seeing your general dentist regularly for cleanings and examinations while in orthodontic treatment.

  • Wire: American Orthodontics Chromium Cobalt
  • Acrylic: JBC Monomer and Polymer
  • Screw: Leone 3-way Expansion Screw