Aim The aim of present study was to compare cyclic fatigue resistance of three modern NiâTi instruments used with continuous rotation. Materials and methods For this study 3 groups of rotating instruments with continuous rotation (HyFlex EDM, Twisted File Adaptive, Revo S SU) have been used, each group consisted of 20 files. The various groups were subjected to cyclic fatigue testing through an artificial metal device. A statistical analysis with KruskalâWallis test and MannâWhitney test was performed. Results There were statistically significant differences between the three groups. The HyFlex EDM instruments have a fracture resistance slightly higher than the Twisted file and far higher than Revo S SU. Conclusions Modern NiâTi alloys increase resistance of the rotating instruments to cyclic fatigue.
Valutazione della resistenza alla fatica ciclica di strumenti rotanti a rotazione continua prodotti con moderne leghe Nickel-Titanio
Amato, Massimo;Pantaleo, Giuseppe;
2017-01-01
Abstract
Aim The aim of present study was to compare cyclic fatigue resistance of three modern NiâTi instruments used with continuous rotation. Materials and methods For this study 3 groups of rotating instruments with continuous rotation (HyFlex EDM, Twisted File Adaptive, Revo S SU) have been used, each group consisted of 20 files. The various groups were subjected to cyclic fatigue testing through an artificial metal device. A statistical analysis with KruskalâWallis test and MannâWhitney test was performed. Results There were statistically significant differences between the three groups. The HyFlex EDM instruments have a fracture resistance slightly higher than the Twisted file and far higher than Revo S SU. Conclusions Modern NiâTi alloys increase resistance of the rotating instruments to cyclic fatigue.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
