Laboratory Rational of Changes in the Crystal Lattice of Nickel-Titanium Endodontic Rotary Files in Autoclaving

Figure 1

Superimposition of X-ray diffraction patterns after 1 (F1-1), 4 (F1-4), and 7 (F1-7) autoclaving cycles. 5 low-intensity peaks (“crown”) are determined on the diffractogram F1-7, and it is the appearance of the martensitic phase in the visibility limit.