The Bite Jumping Appliance (Sander II) is a custom-made, removable set with one upper and one lower acrylic plate. Both plates include a genuine orthodontic expansion-screw assembly, a labial bow across the front teeth, and wire clasps around the back teeth.
The two long guide prongs are integral parts of the upper Sander II expansion screw and project downward toward the lower plate. These prongs and the corresponding lower plate area form the distinctive two-plate construction of this appliance.
The lower plate has a horseshoe-shaped acrylic base and its own central screw assembly. The complete set includes both plates and is made to your existing bite.

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