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Fig. 2. Scanning electron microscopy (SEM) images and atomic force microscopy (AFM) of nickel-titanium (NiTi) and stainless steel (SS) archwires. The SEM images of the uncoated NiTi (A), titanium nitride-coated NiTi (B), uncoated SS (C), and chromium nitride (CrN)-coated SS (D) clearly show that there is an increase in smoothness on their surfaces after the coating process. The AFM images show that the surface roughness of the uncoated SS archwire surface (E) decreased with the CrN coating (F).
Korean J Orthod 2021;51:270~281 https://doi.org/10.4041/kjod.2021.51.4.270
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