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Related Experiment Video

Updated: Jun 22, 2026

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities
12:33

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

Published on: November 15, 2013

[Not Available].

L Testarelli1, N M Grande, G Plotino

  • 1Department of Dental Science, Sapienza University of Rome, Italy.

The Open Dentistry Journal
|June 23, 2009
PubMed
Summary
This summary is machine-generated.

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New twisted nickel-titanium rotary (NTR) endodontic instruments show significantly improved cyclic fatigue resistance. These twisted TF NTR files offer greater durability compared to traditionally manufactured NTR instruments.

Area of Science:

  • Endodontics
  • Materials Science
  • Biomedical Engineering

Background:

  • Nickel-titanium (NiTi) alloy has revolutionized endodontics, yet improvements in raw material properties and manufacturing processes for NiTi rotary (NTR) instruments remain limited.
  • A novel manufacturing method has been developed to produce more flexible and fatigue-resistant NTR instruments.

Purpose of the Study:

  • To evaluate the cyclic fatigue resistance of novel twisted file (TF) NTR instruments.
  • To compare the fatigue performance of TF NTR instruments against NTR instruments manufactured using traditional grinding methods.

Main Methods:

  • Cyclic fatigue tests were conducted using a specialized device to measure cycles to failure.
  • Rotary instruments were tested within simulated curved root canals.
Keywords:
Endodontic instrumentscyclic fatigue.nickel titanium

Related Experiment Videos

Last Updated: Jun 22, 2026

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities
12:33

High-throughput Fluorometric Measurement of Potential Soil Extracellular Enzyme Activities

Published on: November 15, 2013

  • Size 06-25 TF NTR instruments were compared to other 06-25 NTR instruments from various manufacturers.

    • Main Results:

    • Size 06-25 TF NTR instruments demonstrated a statistically significant increase in the mean number of cycles to failure (P < .05).
    • TF instruments exhibited superior fatigue resistance compared to NTR instruments produced via traditional grinding.

    Conclusions:

    • The new twisting manufacturing process significantly enhances the cyclic fatigue resistance of 06-25 TF NTR instruments.
    • TF NTR instruments represent a significant advancement in durability for endodontic rotary files.