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.
