Torsion and Bending Properties of Shape Memory and Superelastic Nickel-Titanium Rotary Instruments

Ninan, Elizabeth; Berzins, David W.

doi:10.1016/j.joen.2012.08.010

Cited by 116 publications

(106 citation statements)

References 15 publications

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“…The M-wire NiTi, as the novel file system ProTaper Next (Dentsply Maillefer, Ballaigues, Switzerland), is subjected to thermomechanical processing resulting in a reported increased flexibility. 13,14 Many fracture simulation studies of NiTi files have been conducted separately for a cyclic fatigue or torsional failure test. 6,15 Only few studies have tried to correlate these 2 factors of fracture.…”

Section: Introductionmentioning

confidence: 99%

Effect of cyclic torsional preloading on cyclic fatigue resistance of ProTaper Next and Mtwo nickel–titanium instruments

Pedullà

Savio

Plotino

et al. 2015

Giornale Italiano di Endodonzia

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Aim: To evaluate the influence of different torsional preloads on cyclic fatigue resistance of endodontic rotary instruments made by conventional nickel-titanium (NiTi) or M-Wire. Methods: Eighty new Mtwo (#25/0.06) (Sweden & Martina, Due Carrare, Padova, Italy) and ProTaper Next X2 (Dentsply Maillefer, Ballaigues, Switzerland) were used. The Torque and distortion angles at failure of new instruments (n = 10) were measured and 0% (n = 10), 25%, 50%, and 75% (n = 20) of the mean ultimate torsional strength as preloading condition were applied according to ISO 3630-1 for each brand. The twenty files tested for every extent of preload were subjected to 25 or 50 torsional cycles (n = 10). After torsional preloading, the number of cycles to failure was evaluated in a simulated canal with 608 angle of curvature and 5 mm of radius of curvature. Data were analyzed using 2-way analysis of variance. Scanning electron microscope (SEM) was performed to evaluate the fracture surface of each fragment.Peer review under responsibility of Società Italiana di Endodonzia.

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Section: Introductionmentioning

confidence: 99%

Effect of cyclic torsional preloading on cyclic fatigue resistance of ProTaper Next and Mtwo nickel–titanium instruments

Pedullà

Savio

Plotino

et al. 2015

Giornale Italiano di Endodonzia

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“…21 Martensit ostenite göre daha yumuşaktır ve CM alaşımında üretilen eğeler daha çok martensittir, bu durum eğelerin döngüsel yorgunluğuna karşı direncine olumlu yönde etki etmektedir. 10 CM alaşımdan üretilen eğelerin konvansiyonel NiTi alaşımdan üretilen eğelere göre döngüsel yorgunluğa karşı daha dirençli olduğu gösterilmiştir. 13,16 Çalışmamızın sonuçlarına göre EXR3 eğesinin döngüsel yorgunluğa karşı PTU ve PTN eğelerinden daha yüksek direnç gösterme-sinin üretildiği CM alaşımından kaynaklandığı dü-şünülmektedir.…”

Section: Discussionunclassified

“…10 Taramalı elektron mikroskobu ile eğelerin kırık yüzeylerinden alınan fotoğraflar incelendiğinde, bütün gruplarda yorgunluğa bağlı kırılma-larda görülen yorgunluk çizgileri gözlendi (Resim 1A-F).…”

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Comparison of Cyclic Fatigue Resistance of ProTaper Universal, ProTaper Next and Extreme CM R3 Nickel Titanium Files

Özyürek¹,

Yılmaz²

2016

Turkiye Klinikleri J Dental Sci

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“…A new Nitinol rotary instrument files with controlled memory (Hyflex® CM, Coltene) was introduced which was machined from a wire (termed CM-wire) previously subjected to a proprietary, novel, thermomechanical processing procedure. Clinical and experimental studies have indicated that these new Hyflex® CM rotary instruments have outstanding clinical fatigue resistance [7]. The Controlled memory effect helps the file to retain the shape of the canal even when it is out of the canal (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Hyflex CM and EDM Files: Revolutionizing the Art and Science of Endodontics

Singh

Kapoor

2016

JDHODT

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Success in endodontic therapy relies on thorough cleaning and shaping of root canal system followed by its complete obturation. With increase in number of cases reporting for endodontic therapy, dental professionals have to deal with more complicated cases such as those with very fine and curved canals. Standard Nickel Titanium rotary endodontic files, because of their shape memory property and larger tapers can often not serve well for such difficult cases. The introduction of controlled memory files (Hyflex, Coltene) and the new generation Electrical discharge machine files (EDM, Coltene) have revolutionized Endodontics by their extraordinary properties which have begun a new era in Dentistry.

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Torsion and Bending Properties of Shape Memory and Superelastic Nickel-Titanium Rotary Instruments

Cited by 116 publications

References 15 publications

Effect of cyclic torsional preloading on cyclic fatigue resistance of ProTaper Next and Mtwo nickel–titanium instruments

Effect of cyclic torsional preloading on cyclic fatigue resistance of ProTaper Next and Mtwo nickel–titanium instruments

Comparison of Cyclic Fatigue Resistance of ProTaper Universal, ProTaper Next and Extreme CM R3 Nickel Titanium Files

Hyflex CM and EDM Files: Revolutionizing the Art and Science of Endodontics

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