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See Latest ArticlesDefects in Nickel-Titanium Instruments after Clinical Use. Part 4: An Electropolished Instrument
Journal of Endodontics, 02/13/09
Shen Y et al. - Shear fracture was diagnosed for 22 (85%) of all those fractured, whereas fatigue occurred in only 4 instruments (15%). There was a marked increase in the amount of defects after the seventh (45.4%) and eighth (100%) use. The results of this study indicated that RaCe instruments commonly exhibited unwinding defects after repeated use, and the most common cause of failure was shear failure.
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