Results 171 to 180 of about 617 (210)
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Influence of Structure on Nickel-Titanium Endodontic Instruments Failure
Journal of Endodontics, 2001The purpose of this work was to investigate the process history on fracture life of nickel-titanium endodontics files. The results are based on microstructural investigations of nickel-titanium engine-driven rotary instruments based on X-ray diffraction, scanning electron microscopy, and microhardness tests. Endodontic files are very work-hardened, and
G, Kuhn, B, Tavernier, L, Jordan
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Fatigue and Mechanical Properties of Nickel-Titanium Endodontic Instruments
Journal of Endodontics, 2002Shape memory alloys are increasingly used in superelastic conditions under complex cyclic deformation situations. In these applications, it is very difficult to predict the service life based on the theoretical law. In the present work, fatigue properties of NiTi engine-driven rotary files have been characterized by using differential scanning ...
Grégoire, Kuhn, Laurence, Jordan
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Cyclic fatigue testing of nickel-titanium endodontic instruments
Journal of Endodontics, 1997Cyclic fatigue of nickel-titanium, engine-driven instruments was studied by determining the effect of canal curvature and operating speed on the breakage of Lightspeed instruments. A new method of canal curvature evaluation that addressed both angle and abruptness of curvature was introduced.
J P, Pruett, D J, Clement, D L, Carnes
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Evaluation of Single-use Rotary Nickel-titanium Instruments
Journal of Endodontics, 2003The purpose of this study was to analyze the number and types of defects observed in single-use, rotary nickel-titanium instruments. Every ProFile Series 29.04 taper nickel-titanium instrument used during a 4-week period in an endodontic specialty practice was collected.
F Charles, Arens +3 more
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The corrosion of nickel–titanium rotary endodontic instruments in sodium hypochlorite
International Endodontic Journal, 2006AbstractAim To evaluate the corrosion resistance of nickel–titanium (NiTi) endodontic rotary instruments immersed in 5.25% sodium hypochlorite (NaOCl) solution.Methodology The corrosion performance of NiTi instruments (S1 25 mm, ProTaper Dentsplay Maillefer, Ballaigues, Switzerland) was evaluated using commercial 5.25% NaOCl solution (pH = 12.3), and
Nóvoa, X R +7 more
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Electrochemical Properties of Nickel-Titanium Rotary Endodontic Instruments
Journal of EndodonticsNickel-titanium rotary endodontic files have been commercially available for decades, but more recent innovations have introduced heat-treated and surface-treated files. This study investigated the corrosion properties of various nickel-titanium files in normal saline and sodium hypochlorite (NaOCl).Ten different file brands of size 40 with a 0.04 ...
Vidyalakshmi, Subramanian +4 more
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Effects of sodium hypochlorite on nickel‐titanium Lightspeed® instruments
International Endodontic Journal, 1998Sodium hypochlorite is a major irrigant in endodontics, and nickel‐titanium instruments are gaining in popularity. This paper investigated the corrosion of nickel‐titanium Lightspeed® instruments in 1% and 5 % NaOCl solutions. The instruments were immersed in ultrasonicated NaOCl solutions for varying times up to 1 h.
Busslinger A, Sener B, Barbakow F
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Effect of Environment on Low-cycle Fatigue of a Nickel–Titanium Instrument
Journal of Endodontics, 2007This study examined the low-cycle fatigue (LCF) behavior of a nickel-titanium (NiTi) engine-file under various environmental conditions. One brand of NiTi instrument was subjected to rotational-bending fatigue in air, deionized water, sodium hypochlorite, or silicone oil. The curvature of each instrument, diameter of the fracture cross-section, and the
Darvell, BW, Cheung, GSP, Shen, Y
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Relationship between file size and stiffness of nickel titanium instruments
Dental Traumatology, 1995Abstract – The purpose of this study was to evaluate the relationship existing between file size and stiffness for 3 endodontic files made of nickel titanium. Three groups of instruments with different cross‐sections were tested: a triangular cross‐section, a square cross‐section and a modified triangular cross‐section. The instruments were tested from
J J, Camps, W J, Pertot, B, Levallois
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The Effects of Torsional Preloading on the Torsional Resistance of Nickel-titanium Instruments
Journal of Endodontics, 2017This study evaluated the effect of torsional preloading on the torsional resistance of nickel-titanium (NiTi) endodontic instruments.WaveOne Primary (Dentsply Maillefer, Ballaigues, Switzerland) and ProTaper Universal F2 (Dentsply Maillefer) files were used. The ultimate torsional strength until fracture was determined for each instrument. In the phase
Seung-Hei Oh +5 more
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