The Twisted File is a rotary nickel titanium file used for endodontic (root) canal preparations. €¢ R-phase heat treatment technology €¢ Twisted design, not ground €¢ Advanced surface treatment €¢ Safer, efficient shaping €¢ Significantly lowers the number of files used per endo case €¢ Improves clinical efficiency in completing endo cases €¢ Reduces chairtime for patients €¢ Greatly lowers the level and cost of file inventory normally needed in the office