ORTHOBITES Fig. 24 Fig. 19 Fig. 20 Fig. 25 Fig. 21 Fig. 26 Fig. 27 Fig. 28 Fig. 22 Fig. 23 ᕤ It can be used as a habit appliance, anti-thumb appliance (Figs. 22 – 24) ᕥ It can be modified as impacted palatal canine guidance appliance.(Figs. 25 – 28) ᕦ And the author has used it to also constrict over expanded upper arches (Fig. 29) As with all appliances, learning how to place them has a learning curve to overcome. The NPE2 is no differ-ent. Learning how best to place it takes trial and error. I have employed the refrigerant spray technique (Figs. 30 -32) I have also poured the bands up on a model and tied it together with rubber bands, and inserted the bands and expander as a unit (Figs. 33 – 34). Now I simply “man-handle: it into the sheaths. Experience always is the best teacher. One superior thing about this appliance is that one can adjust it extra orally with an NPE plier. As Figs. 35 -43 demonstrate, one can expand or constrict the ther-mal, ortholoy, and stainless steel components, therefore only having to use one appliance. How sweet is that! No alginate Impressions needed. Size the appliance per www.orthodontics.com November/December 2013 19