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Cyclic fatigue, bending resistance, and surface roughness of ProTaper Gold and EdgeEvolve files in canals with single- and double-curvature
Article in En | WPRIM | ID: wpr-741994
Responsible library: WPRO
ABSTRACT
OBJECTIVES: The purpose of this study was to evaluate the cyclic fatigue, bending resistance, and surface roughness of EdgeEvolve (EdgeEndo) and ProTaper Gold (Dentsply Tulsa Dental Specialties) nickel-titanium (NiTi) rotary files. MATERIALS AND METHODS: The instruments (n = 15/each) were tested for cyclic fatigue in single- (60° curvature, 5-mm radius) and double-curved (coronal curvature 60°, 5-mm radius, and apical curvature of 30° and 2-mm radius) artificial canals. The number of cycles to fracture was calculated. The bending resistance of both files were tested using a universal testing machine where the files were bent until reach 45°. Scanning electron microscopy and x-ray energy-dispersive spectrometric analysis were used for imaging the fractured segments, while the atomic force microscope was used to quantify the surface roughness average (Ra). RESULTS: EdgeEvolve files exhibited higher cyclic fatigue resistance than ProTaper Gold files in single- and double-curved canals (p 0.05). EdgeEvolve files showed significantly lower Ra values than ProTaper Gold files (p < 0.05). CONCLUSIONS: Within the limitation of this study, EdgeEvolve files exhibited significantly higher cyclic fatigue resistance than ProTaper Gold files in both single- and double-curved canals.
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Full text: 1 Index: WPRIM Main subject: Radius / Microscopy, Electron, Scanning / Pliability / Fatigue Language: En Journal: Restorative Dentistry & Endodontics Year: 2019 Type: Article
Full text: 1 Index: WPRIM Main subject: Radius / Microscopy, Electron, Scanning / Pliability / Fatigue Language: En Journal: Restorative Dentistry & Endodontics Year: 2019 Type: Article