“There are several alternative methods to determine the correct size of NPE to use. Either in the mouth or on a stone model, I measure from the lingual of the maxillary first molars straight across the arch and add 4mm to determine the correct size of NPE to use.” Fig. 14 Fig. 13 Fig. 15 maxillary first molars straight across the arch and add 4mm to determine the correct size of NPE to use. • Rotates 6 I 6 distally • Expands the maxillary arch • Can be used for anchorage • The low continuous force is the result of a transi-tion temperature of 94°F and shape memory • Mouth warmth activates movement in the ther-mal nickel titanium energy wire toward the NPE’s pre-programmed shape 3 • Ortholoy arms and bayonet ends may be adjusted for arch expansion and molar torque control • Available in 10 sizes sequentially in 2mm incre-ments • Requires an .036x.072 slotted horizontal lingual sheath to be welded onto the molar bands How do I place buccal root torque in 6 l 6? With an Adam’s plier (triangular flat on flat) grasp the bayonet end of the NPE and rotate approximately 15 degrees to the buccal. Repeat on the other side (Fig. 15-A). Why do I place buccal root torque in 6 l 6? We are expanding occlusal to the COR in the trans-verse plane. The possibility of tipping 6 l 6 to the buccal exists if buccal root torque is not programmed into the NPE. How do I determine the correct size NPE to use? There are several alternative methods to determine the correct size of NPE to use. Either in the mouth or on a stone model, I measure from the lingual of the How do I re-activate the NPE? On a subsequent visit remove the NPE from the mouth. Squeeze one of the lateral ortholoy loops to flatten it slightly. Move the now buccally-rotated ortholoy arm back toward the lingual to its original position (Fig 15-B) and repeat on the other side. www.orthodontics.com Summer 2016 19
Journal of the American Orthodontic Society Summer 2016 / Buyer's Guide: Page 19
