Cyclic Fatigue Resistance of Three Different Nickel-Titanium Instruments after Immersion in Sodium Hypochlorite

Pedullà, Eugenio; Grande, Nicola M.; Plotino, Gianluca; Pappalardo, A.; Rapisarda, E.

doi:10.1016/j.joen.2011.04.008

Cited by 62 publications

(88 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It has been reported to have a higher fatigue fracture resistance than ground files (66,(69)(70)(71)(72). Pedulla et al (73) evaluated the resistance to cyclic fatigue of the TF, Mtwo (VDW, Munich, Germany), and Revo S Shaping Universal (SU; Micro Mega, Besancon, France) files after immersion in sodium hypochlorite. The results showed that static or dynamic immersion in NaOCl for 1 or 5 minutes did not reduce the fatigue resistance (in dry condition tests) of NiTi files.…”

Section: R-phasementioning

confidence: 99%

Current Challenges and Concepts of the Thermomechanical Treatment of Nickel-Titanium Instruments

Shen

Zhou

Zheng

et al. 2013

Journal of Endodontics

458

438

View full text Add to dashboard Cite

Introduction: The performance and mechanical properties of nickel-titanium (NiTi) instruments are influenced by factors such as cross-section, flute design, raw material, and manufacturing processes. Many improvements have been proposed by manufacturers during the past decade to provide clinicians with safer and more efficient instruments. Methods: The mechanical performance of NiTi alloys is sensitive to their microstructure and associated thermomechanical treatment history. Heat treatment or thermal processing is one of the most fundamental approaches toward adjusting the transition temperature in NiTi alloy, which affects the fatigue resistance of NiTi endodontic files. The newly developed NiTi instruments made from controlled memory wire, M-Wire (Dentsply Tulsa Dental Specialties, Tulsa, OK), or R-phase wire represent the next generation of NiTi alloys with improved flexibility and fatigue resistance. The advantages of NiTi files for canal cleaning and shaping are decreased canal transportation and ledging, a reduced risk of file fracture, and faster and more efficient instrumentation. The clinician must understand the nature of different NiTi raw materials and their impact on instrument performance because many new instruments are introduced on a regular basis. Results: This review summarizes the metallurgical properties of next-generation NiTi instruments, the impact of thermomechanical treatment on instrument flexibility, and the resistance to cyclic fatigue and torsion. Conclusions: The aim of this review was to provide clinicians with the knowledge necessary for evidence-based practices, maximizing the benefits from the selection and application of NiTi rotary instruments for root canal treatment. (J Endod 2013;39:163-172)

show abstract

Section: R-phasementioning

confidence: 99%

Current Challenges and Concepts of the Thermomechanical Treatment of Nickel-Titanium Instruments

Shen

Zhou

Zheng

et al. 2013

Journal of Endodontics

458

438

View full text Add to dashboard Cite

show abstract

“…Several studies have evaluated cyclic fatigue resistance of different NiTi instruments after immersion in NaOCl [13,32]. However, the current study evaluated the cyclic fatigue resistance of different retreatment systems after immersion in NaOCl.…”

Section: Discussionmentioning

confidence: 97%

“…For the dynamic immersion, the retreatment files were attached to an endodontic motor (X-Smart; Dentsply Maillefer) and rotated freely at constant speed (400 rpm for ProTaper D3, 600 rpm for D-RaCe DR2, 280 rpm for Mtwo R2) in a small glass container with the amount of the NaOCl solution necessary to contact 16 mm of instruments. Immediately after removal from immersion, all files were rinsed by bidistilled water to neutralize the effect of NaOCl, dried, registered with an ID number, and stored in glass vials [13].…”

Section: Methodsmentioning

confidence: 99%

“…As in the canal instrumentation, the working part of retreatment instruments contacts dynamically the NaOCl solution for a few minutes during the removal of root canal filling material. Several authors have studied the effect of NaOCl on cyclic fatigue resistance of NiTi instruments used for canal preparation [12][13][14]. However, there is no study evaluating the fatigue behavior of retreatment instruments after immersion in NaOCl solution.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cyclic fatigue resistance of D-RaCe, ProTaper, and Mtwo nickel–titanium retreatment instruments after immersion in sodium hypochlorite

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Several authors have studied the corrosive effect of NaOCl on traditional endodontic NiTi instruments. [33][34][35] Some authors have studied cyclic fatigue resistance of new reciprocating NiTi instruments after exposure to NaOCl.…”

Section: 24mentioning

confidence: 99%

Cyclic Fatigue Resistance of Three Single-use NiTi Instruments after Immersion in Sodium Hypochlorite

Dagna¹,

Beltrami²,

Colombo³

et al. 2014

International Journal of Experimental Dental Science

View full text Add to dashboard Cite

The aim of this in vitro study was to compare the cyclic fatigue resistance of three single-use nickel-titanium (NiTi) instruments (One Shape, Reciproc and Wave One) after immersion in sodium hypochlorite (NaOCl) solution over several time periods. A total of 135 One Shape, Reciproc R25 and Wave One Primary were tested. The 45 files of the same brand were randomly assigned to three groups (n = 15) and submitted to the following immersion protocol: 1 minute in 5% NaOCl at 37ºC, 5 minutes in 5% NaOCl at 37ºC, no immersion (as control). Cyclic fatigue test was performed rotating/reciprocating all instruments in a stainless steel curved artificial canal (60º angle of curvature and 5 mm radius). The number of cycles to fracture (NCF) was determined by measuring the time to fracture. The data were compared for differences by using 2-way analysis of variance (p < 0.05). In general, resistance to cyclic fatigue was not significantly affected by immersion in NaOCl. Reciproc R2 showed the highest cyclic fatigue resistance in all groups compared to One Shape and Wave One. Immersion in NaOCl for 1 or 5 minutes did not reduce the cyclic fatigue resistance of NiTi single-use instruments significantly. Reciproc were more resistant, but the new rotary single-use One Shape instruments showed mechanical resistance similar to NiTi files developed for reciprocating motion.

show abstract

Cyclic Fatigue Resistance of Three Different Nickel-Titanium Instruments after Immersion in Sodium Hypochlorite

Cited by 62 publications

References 32 publications

Current Challenges and Concepts of the Thermomechanical Treatment of Nickel-Titanium Instruments

Current Challenges and Concepts of the Thermomechanical Treatment of Nickel-Titanium Instruments

Cyclic fatigue resistance of D-RaCe, ProTaper, and Mtwo nickel–titanium retreatment instruments after immersion in sodium hypochlorite

Cyclic Fatigue Resistance of Three Single-use NiTi Instruments after Immersion in Sodium Hypochlorite

Contact Info

Product

Resources

About