ArticleInternational endodontic journal2025
The impact of blade geometry (nonflat, flat or hybrid) and metallurgical composition on the mechanical performance of NiTi endodontic instruments: A multimethod laboratory study.
Article in International endodontic journal, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
6 citing papers in PubMed.
- Beyond S-cross section design: mechanical properties, metallurgical features and shaping ability of two nickel-titanium rotary instruments in double curved canals.Clinical oral investigations · 2026Article
- Effects of Flat-Side Design on Torsional and Bending Stress of Nickel-Titanium File by Finite Element Analysis.Bioengineering (Basel, Switzerland) · 2026Article
- Mechanical properties and micro-CT-based biomechanical performance of NiTi instrumentation systems in mandibular molars.Odontology · 2026Article
- The effect of the flat-side in an engine-driven full-sequence file system on root Canal disinfection: a preliminary ex vivo investigation.BMC oral health · 2026Article
- NiTi instruments in endodontics: contemporary concepts, principles, and practical guidance.Brazilian oral research · 2026Review
- The impact of blade geometry (nonflat, flat or hybrid) and metallurgical composition on the mechanical performance of NiTi endodontic instruments: A multimethod laboratory study.International endodontic journal · 2025Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
9 authors.
Funding
Abstract
aimTo evaluate the influence of blade design (conventional, flat and hybrid) and metallurgical properties on the mechanical performance of nickel-titanium endodontic instruments. METHODOLOGY: Two hundred and seven NiTi instruments (25 mm in length) with three different blade designs were selected for analysis: conventional (n = 69, CC One Blue, size 25/0.08v), flat (n = 69, Platinum V.EU, size 25/0.06) and hybrid (n = 69, Flash Endo Power, size 25/0.06v). The instruments were evaluated regarding geometric design (scanning electron microscopy), alloy elements composition (energy-dispersive X-ray spectroscopy) and phase transformation temperatures (differential scanning calorimetry). Additionally, their mechanical behaviour was investigated by testing cyclic fatigue resistance, torsional resistance, bending resistance, buckling resistance, cutting efficiency and microhardness. Statistical significance was determined using One-Way anova and Kruskal-Wallis tests (α = 5%).
resultsPlatinum V.EU and Flash instruments exhibited design inconsistencies within the same lot, including nonstandard positioning and variations in the length of the flat side. All instruments were composed of a nickel-titanium alloy with equiatomic ratios of nickel and titanium. At 20°C, Flash instruments exhibited a mixed R-phase and austenitic arrangement, transitioning fully to austenitic at 36°C, while CC One Blue and Platinum V.EU displayed a complete R-phase at 20°C and retained a mixed R-phase and austenitic arrangement at 36°C. The CC One Blue exhibited superior performance in time to fracture (156 ± 34 s), maximum torque (1.5 N·cm) and buckling strength (372 ± 31 gf) (p < .0001), while no differences were found in maximum rotation angle (p = .602). In terms of flexibility, the Flash (328 gf) and CC One Blue (341 gf) outperformed the Platinum V.EU (376 gf) (p = .006). Flash (121 gf) and CC One Blue (137 gf) also outperformed Platinum V.EU (253 gf) in terms of cutting efficiency (p < .0001). Conversely, the Platinum V.EU demonstrated significantly higher microhardness (386 ± 45 HVN) compared to CC One Blue and Flash (p = .0340).
conclusionsOverall, instruments featuring either flat-side (Platinum V.EU) or hybrid (Flash) active blades demonstrated inferior mechanical performance compared to the conventional nonflat instrument (CC One Blue).
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.