Impact of pecking amplitude on cyclic fatigue of new nickel–titanium files

Author:

Pedullà Eugenio1,Carlesi Teocrito23,Pappalardo Alfio4,Canova Francesco Saverio1,Malagnino Vito Antonio3,La Rosa Giusy Rita Maria1ORCID,Generali Luigi5

Affiliation:

1. Department of General Surgery and Medical‐Surgical Specialties University of Catania Catania Italy

2. Department of Medical, Oral and Biotechnological Sciences, Faculty of Medicine and Surgery University of Chieti—Pescara “G. D'Annunzio” Chieti Italy

3. Department of Innovative Technologies in Medicine and Dentistry, Faculty of Medicine and Surgery University of Chieti—Pescara “G. D'Annunzio” Chieti Italy

4. Private practitioner Catania Italy

5. Department of Surgery, Medicine, Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance University of Modena and Reggio Emilia Modena Italy

Abstract

AbstractObjectivesThe aim of this study is to determine the cyclic fatigue resistance of Mtwo Minimal in static and dynamic tests, with different amplitudes of pecking movements, at intracanal temperature.Materials and MethodsTwo hundred new 25‐mm Mtwo Minimal rotary files (#10/0.035, #17.5/0.045, #25/0.05, #40/0.03, #45/0.03) were tested in static and dynamic cyclic fatigue tests at 35°C (±1°C). An artificial stainless‐steel canal was used. In the dynamic mode, axial movements were set at 1 and 3 mm. The number of cycles to fracture (NCF) was recorded and statistically analyzed by one‐way analysis of variance (p < 0.05).ResultsThe 3‐mm dynamic test showed significantly increased NCF than the other tests for the #10/0.035, #17.5/0.045, and #25/0.05 files (p < 0.05). The #40/0.03 and #45/0.03 files showed no significant differences in all the tests (p > 0.05).ConclusionMtwo Minimal showed higher cyclic fatigue resistance in the dynamic test than the static test, except for the larger instruments. The 3‐mm pecking amplitude increased the cyclic fatigue resistance of the smaller instruments.

Publisher

Wiley

Subject

General Dentistry

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