Leone Expansor Series for Fixed Appliances Leone’s fixed appliance Expansors are the only hygienic rapid palatal expansors made from 100% surgical grade stainless steel. And now, Leone’s new laser lightning welding process improves upon an already great Expansor appliance. Laser welding of the extension arms into the body of the Expansor creates a solderless bond that eliminates oxidation and corrosion in the oral environment. The final laser welded Expansor’s arm and body literally fuse together forming a single Expansor housing. This single construction is completely smooth and eliminates any chance of plaque build up in secluded areas. Batch numbers, directional arrows and expander sizings are laser etched into the palatal expansor, facilitating use and accuracy of patient records. • Welding of the arms into the Expansor is done without solder, eliminating oxidation and corrosion in the oral environment • Specially designed activation holes stop key from accidentally hitting the palate • Directional arrows, expander sizings, and batch numbers are permanently laser etched into the surface"