Comparative evaluation of the cyclic fatigue resistance of four Ni-Ti instruments in simulated root canal curvatures using CAD/CAM technology.
Background: This study aimed to evaluate and compare the cyclic fatigue resistance of new generation nickel-titanium file systems in simulated single and double curvature ceramic root canals. Methods: A total of 80 Nickel–Titanium (Ni-Ti) instruments—TruNatomy (TN) (26/0.04), WaveOne Gold (WOG) (25/...
| Publicado en: | BMC Oral Health Vol. 25; no. 1; pp. 1 - 11 |
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| Autores principales: | , |
| Formato: | pictorial research tables/charts Journal Article |
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BioMed Central
8/23/2025
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=187496525&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 187496525 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 14726831 1CIC jtl: BMC Oral Health issn: 14726831 maglogo: N pubinfo: dt: 8/23/2025 vid: 25 iid: 1 pid: 24147 pub: BioMed Central artinfo: ui: 187496525 187496525 187496525 10.1186/s12903-025-06710-y 187496525 ppf: 1 ppct: 10 formats: tig: atl: Comparative evaluation of the cyclic fatigue resistance of four Ni-Ti instruments in simulated root canal curvatures using CAD/CAM technology. aug: au: Yıldız, Tuğçenur Zan, Recai affil: https://ror.org/04ttnw109 Department of Endodontics, Faculty of Dentistry, Sakarya University, 54100, Sakarya, Turkey sug: subj: Computer-Aided Design Utilization Nickel Titanium Dental Instruments Root Canal Therapy Dental Pulp Cavity Human Comparative Studies Turkiye Dentistry Equipment Design Equipment Failure Microscopy, Electron, Scanning Materials Testing Kruskal-Wallis Test Mann-Whitney U Test Descriptive Statistics Funding Source ab: Background: This study aimed to evaluate and compare the cyclic fatigue resistance of new generation nickel-titanium file systems in simulated single and double curvature ceramic root canals. Methods: A total of 80 Nickel–Titanium (Ni-Ti) instruments—TruNatomy (TN) (26/0.04), WaveOne Gold (WOG) (25/0.07), Reciproc Blue (RecB) (25/0.08), and One Curve (OC) (25/0.04)—were tested under simulated intracanal thermal conditions (35 ± 0.1 °C). The instruments were evaluated within custom-designed artificial canals fabricated from ceramic blocks, incorporating either a single curvature (SC; 60° angle, 5 mm radius) or a double curvature configuration (DC; coronal bend: 60°, 5 mm radius; apical bend: 60°, 2 mm radius). For each instrument, the time until fracture occurred was recorded, and the number of cycles to failure (NCF) was calculated accordingly. Fragment lengths (FLs) were measured using a digital microcaliper, and the topography of the fracture surfaces was analyzed through scanning electron microscopy (SEM). Data were statistically assessed using non-parametric Kruskal–Wallis and Mann–Whitney U tests, with significance defined at the p-value threshold of < 0.05. Results: RecB files demonstrated the highest NCF in the SC group (p < 0.05). TN and OC had significantly lower NCF than RecB (p < 0.05) but were statistically similar (p > 0.05). WOG recorded the lowest NCF in SC (p < 0.05). In the DC group, WOG also showed the lowest NCF (p < 0.05), with no significant differences among the other three files (p > 0.05). SEM analysis revealed that nearly all fractured instruments exhibited a ductile fracture pattern, characterized by the presence of microcavities and pits, which are typically associated with cyclic fatigue failure. Conclusions: Selecting Ni-Ti file systems based on canal anatomy is essential for minimizing fatigue-related failures. RecB exhibited superior resistance in SC canals, while WOG showed consistently lower performance in both configurations, warranting cautious use in curved canals. These findings underscore the importance of matching instrument selection to canal morphology and mechanical demands to ensure safe and predictable clinical outcomes. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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