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Restor Dent Endod. 2018 May;43(2):e15. English. Original Article.
Keskin C , Demiral M , Sarıyılmaz E .
Department of Endodontics, Ondokuz Mayıs University Faculty of Dentistry, Samsun, Turkey.
Çekmekoy Oral Health Center, Istanbul, Turkey.
Department of Endodontics, Ordu University Faculty of Dentistry, Ordu, Turkey.


The present study aimed to evaluate the shaping ability of 2 thermally treated nickel-titanium reciprocating systems in simulated curved canals.

Materials and Methods

Forty simulated canals were prepared to apical size 25 using Reciproc Blue R25 (VDW) and WaveOne Gold Primary (Dentsply Sirona) instruments. Standard pre- and post-preparation images were taken and superimposed. The removal of resin material was measured at 5 standard points: the canal orifice, halfway between the canal orifice and the beginning of the curve, the beginning of the curve, the apex of the curve, and the end-point of the simulated canal. The data were analysed using the independent sample t-test with a 5% significance threshold.


The canals in which Reciproc Blue R25 was used showed a significantly greater widening than those in which WaveOne Gold was used at 4 of the 5 measurement points (p < 0.05). The Reciproc Blue R25 instrument removed significantly more resin from the inner aspect of the curve at 2 of the 5 points and similar amounts at the remaining 3 points. At the 2 apical points, there was no significant difference between the Reciproc Blue R25 and WaveOne Gold Primary instruments.


Both instruments respected the original canal anatomy; however, WaveOne Gold resulted in a more conservative shape with less transportation.

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