Table 4.

Studies on the electropolishing (EP) of NiTi rotary instruments

Authors	Results
Herold et al. [49]	EP did not inhibit the development of microfractures in EndoSequence rotary instruments.
Anderson et al. [46]	EP prolonged the fatigue life of rotary NiTi endodontic instruments.
Bui et al. [50]	EP significantly reduced resistance to cyclic fatigue but did not affect torsional resistance and cutting efficiency, however, the angle at failure and amount of unwinding were decreased.
Cheung et al. [48]	EP did not enhance low cyclic fatigue life of NiTi instruments subjected to rotational bending. In addition, EP did not improve the resistance to corrosion of strain-cycled instruments.
Boessler et al. [51]	EP of ProTaper shaping instruments led to increased torque during preparation of simulated root canals.
Tripi et al. [52]	The electropolished race instrument demonstrates an increased resistance to fatigue failure.
Praisarnti et al. [53]	Low cyclic fatigue failure of a RaCe NiTi instrument rotating with a curvature in a corrosive environment enhanced by a magneto EP process.
Lopes et al. [54]	The EP of BioRace endodontic instruments significantly increased the number of cycles to fracture under rotating-bending conditions within an artificial curved canal.