Abstract :
Precise positioning and stabilization of the expansion screw are crucial steps in fabricating a removable expansion appliance. The current method of inserting the plastic handle of the screw into a wax-filled well in the working model is unwieldy and often unsatisfactory. We present a simple device that is easy to construct and effective for the purpose. It permits adjustments in the depth and angulation of the screw and secures it firmly during appliance fabrication.
Keyword :
Parts of positioner device, Lateral plate, Central plate