Comparison of root canal preparation using Flex Master Ni-Ti and Endo-Eze AET stainless steel instruments

The expanded use of nickel-titanium (NiTi) rotary instruments in root canal procedures has led to the development of a wide variety of shapes, designs and applications. Root canal anatomy has not changed, however, and the same challenges exist in both initial treatment and the revision of unacceptable treatment. These challenges include application with high levels of achievement and low to no levels of adverse effects, such as instrument fracture, root canal wall ledging, dentine wall perforation and so forth. To that end, many manufacturers have been seeking ways to alter the presently available and wide range of root canal instrument designs, with a focus on altering the surface of the alloy or altering the alloy microstructure with post-machining or post-twisting heat treatment. This focused review will address the impact that these modifications have had on instrument flexibility, resistance to cyclic fatigue and cutting efficiency.

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“…2003, Paqué et al. 2005, Nordmeyer et al. 2011) even whilst using appropriate irrigation protocols (Arruda et al.…”

Section: Properties Of Nitinol In Clinical Applicationsmentioning

confidence: 99%

Alteration in the inherent metallic and surface properties of nickel–titanium root canal instruments to enhance performance, durability and safety: a focused review

2011

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“…The system is complemented with five manual K-type Apical Finishing NiTi files designed for the final enlargement of the apical portion of the root. 11,12 Recently, two new systems were developed for use in reciprocating motion designed for single-file root canal preparation: Reciproc (VDW, Munich, Germany) and WaveOne (Dentsply Maillefer, Ballaigues, Switzerland). 9,13,14 These instruments are made of a new NiTi alloy called M-Wire, which gives more resistance to the file.…”

Section: Introductionmentioning

confidence: 99%

CT study of the performance of reciprocating and oscillatory motions in flattened root canal areas

Moura-Netto

Palo

Pinto³

et al. 2014

Braz. oral res.

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Root canal preparation is an important step in endodontic treatment. The anatomical complexity of the middle third of the root compromises the effective cleaning of this area. Thus, advances have been made in instrumentation techniques and instruments for this purpose. The aim of this study was to evaluate the effects of three different instrumentation systems on the enlargement of the middle thirds of root canals in mandibular incisors. The preparation methods used were the reciprocating systems Reciproc (Group I) and WaveOne (Group II) and the oscillatory system Tilos (Group III). Comparisons were made by three-dimensional image reconstruction with cone-beam computed tomography before and after instrumentation. Changes in area, perimeter, centering ability, and pattern of preparation were analyzed. The results were subjected to ANOVA complemented by the Tukey's test. Changes in area, perimeter, and tendency of transportation showed similar results among groups. The transportation index of the Tilos system was significantly lower than that of the other groups. Qualitative analysis of the preparation pattern showed that the Tilos system had a more uniform preparation, although Reciproc and WaveOne preparations appeared more rounded, incompatible with the original canal anatomy. There was similarity in the systems' performance on flattened areas, although the Tilos system presented a better pattern of root canal preparation and a lower index of transportation.

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“…[5][6][7][8][9][10] The limitations of each of these methods have been extensively discussed, 11,[20][21][22][23] encouraging continuing research into technologies that allow both quantitative and qualitative three-dimensional assessments of the root canal. To this end, the present study compared the µCT and the cross-sectioning methods used to quantify apical transportation after rotary instrumentation of curved canals at 2.0, 3.5, and 5.0 mm from the apex.…”

Section: Discussionmentioning

confidence: 99%

“…The main advantages of this widely-used method are the possibility to compare the root canal structure before and after instrumentation, and the fact that the analyzes are conducted in the real image of the root canal. 10,11,20,21,24 However, disadvantages have also been described, e.g., assessment restricted to limited portions of the root canal, insofar as this is a two-dimensional technique, and material may be lost from serial tooth sectioning. Moreover, it is an invasive method, with irreversible changes to specimens.…”

Section: Discussionmentioning

confidence: 99%

“…Other authors have also described this loss of root structure as leading to slight discrepancies between sections. 11,20,21 Nonetheless, although the cross-section method obtains faithful measurements based on the real image of the specimen, sectioning of the roots does not allow simulation of clinical conditions during root canal preparation.…”

Section: Discussionmentioning

confidence: 99%

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Assessing apical transportation in curved canals: comparison between cross-sections and micro-computed tomography

et al. 2012

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Assessing apical transportation in curved canals: comparison between cross-sections and micro-computed tomography Abstract: The aim of this study was to compare two methods of assessing apical transportation in curved canals after rotary instrumentation, namely, cross-sections and micro-computed tomography (µCT). Thirty mandibular molars were divided into two groups and prepared according to the requirements of each method. In G1 (cross-sections), teeth were embedded in resin blocks and sectioned at 2.0, 3.5, and 5.0 mm from the anatomic apex. Pre-and postoperative sections were photographed and analyzed. In G2 (µCT), teeth were embedded in a rubber-base impression material and scanned before and after instrumentation. Mesiobuccal canals were instrumented with the Twisted File (TF) system (SybronEndo, Orange, USA), and mesiolingual canals, with the EndoSequence (ES) system (Brasseler, Savannah, USA). Images were reconstructed, and sections corresponding to distances 2.0, 3.5, and 5.0 mm from the anatomic apex were selected for comparison. Data were analyzed using Mann-Whitney's test at a 5% significance level. The TF and ES instruments produced little deviation from the root canal center, with no statistical difference between them (P > 0.05). The canal transportation results were significantly lower (0.056 mm) in G2 than in G1 (0.089 mm) (p = 0.0012). The µCT method was superior to the cross-section method, especially in view of its ability to preserve specimens and provide results that are more closely related to clinical situations.

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Comparison of root canal preparation using Flex Master Ni-Ti and Endo-Eze AET stainless steel instruments

Cited by 7 publications

References 39 publications

Alteration in the inherent metallic and surface properties of nickel–titanium root canal instruments to enhance performance, durability and safety: a focused review

Alteration in the inherent metallic and surface properties of nickel–titanium root canal instruments to enhance performance, durability and safety: a focused review

CT study of the performance of reciprocating and oscillatory motions in flattened root canal areas

Assessing apical transportation in curved canals: comparison between cross-sections and micro-computed tomography

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