ArticleInternational endodontic journal2025
Diamond-like carbon coating enhances mechanical performance of NiTi rotary instruments: A multimethod analysis.
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 3 papers.
What it found
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The trial behind it
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Who cites it
3 citing papers in PubMed.
- Mechanical properties and micro-CT-based biomechanical performance of NiTi instrumentation systems in mandibular molars.Odontology · 2026Article
- NiTi instruments in endodontics: contemporary concepts, principles, and practical guidance.Brazilian oral research · 2026Review
- Diamond-like carbon coating enhances mechanical performance of NiTi rotary instruments: A multimethod analysis.International endodontic journal · 2025Article
Corrections and comments
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Authors and funding
7 authors.
Funding
Abstract
aimThis study aimed to evaluate the impact of diamond-like carbon (DLC) surface treatment on the mechanical properties of nickel-titanium (NiTi) rotary instruments. METHODOLOGY: One hundred and ten nickel-titanium instruments with a size of 25/.06 and a length of 25 mm, both with (n = 55) and without (n = 55) a DLC coating were selected and compared regarding their design (stereomicroscopy, scanning electron microscopy), metallurgy (energy-dispersive X-ray spectroscopy, differential scanning calorimetry), and mechanical performance (time to fracture, bending strength, buckling strength, cutting efficiency, and microhardness). Data were analysed using Mann-Whitney and independent Student's t-test (α = 5%).
resultsThe design analysis confirmed that both instruments had identical geometric features, similar spiral and tip designs, with DLC-coated instruments showing fewer surface irregularities and a multi-coloured appearance. Metallurgical analysis revealed identical transformation temperatures for both groups, with the R-phase starting at ~32°C, finishing at ~25°C during cooling, and the austenitic finish occurring at ~35°C. DLC-coated instruments demonstrated significantly superior cyclic fatigue resistance (p = 0.0028), lower bending load (p = 0.0294), lower cutting efficiency (p < 0.0001), and higher microhardness (p = 0.0019), whilst no difference was observed in terms of buckling strength (p = 0.3569).
conclusionsDiamond-like carbon surface treatment significantly enhanced cyclic fatigue resistance, flexibility, and microhardness of NiTi rotary instruments without compromising their structural integrity.
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