Impact of pecking amplitude on cyclic fatigue of new nickel-titanium files.

Autor: Pedullà E; Department of General Surgery and Medical-Surgical Specialties, University of Catania, Catania, Italy., Carlesi T; Department of Medical, Oral and Biotechnological Sciences, Faculty of Medicine and Surgery, University of Chieti-Pescara 'G. D'Annunzio', Chieti, Italy.; Department of Innovative Technologies in Medicine and Dentistry, Faculty of Medicine and Surgery, University of Chieti-Pescara 'G. D'Annunzio', Chieti, Italy., Pappalardo A; Private practitioner, Catania, Italy., Canova FS; Department of General Surgery and Medical-Surgical Specialties, University of Catania, Catania, Italy., Malagnino VA; Department of Innovative Technologies in Medicine and Dentistry, Faculty of Medicine and Surgery, University of Chieti-Pescara 'G. D'Annunzio', Chieti, Italy., La Rosa GRM; Department of General Surgery and Medical-Surgical Specialties, University of Catania, Catania, Italy., Generali L; Department of Surgery, Medicine, Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance, University of Modena and Reggio Emilia, Modena, Italy.
Jazyk: angličtina
Zdroj: Clinical and experimental dental research [Clin Exp Dent Res] 2024 Feb; Vol. 10 (1), pp. e811. Date of Electronic Publication: 2023 Dec 06.
DOI: 10.1002/cre2.811
Abstrakt: Objectives: The 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 Methods: Two 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).
Results: The 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).
Conclusion: Mtwo 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.
(© 2023 The Authors. Clinical and Experimental Dental Research published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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