Electrochemical Impedance Spectroscopy Investigation on the Clinical Lifetime of ProTaper Rotary File System

Figure 3

Optical microscope images: (a) F1 set 4, (b) S1 set 5, (c) S2 set 6, (d) F1 set 7, (e) S2 set 12, and (f) F1 set 13.

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