Effect of irrigation on surface roughness and fatigue resistance of controlled memory wire nickel‐titanium instruments

Cai, Jingxuan; Tang, Xuehua; Ge, Jianli

doi:10.1111/iej.12676

Cited by 31 publications

(31 citation statements)

References 33 publications

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“…These numbers are in average with the numbers recorded by Yılmaz and Ozyürek (34) . Our results were much higher than the numbers recorded by Cai et al, (6) where they tested new and immersed hyflex files for 10 minutes in NaOCl 5.25% and less than Shen etal., (35) where they tested typhoon CM files after immersion in 6% NaOCl for 25 minutes. The difference in numbers which is not high may be attributed to the difference in file design between the typhoon and the Mpro.…”

Section: Discussioncontrasting

confidence: 75%

“…File at body temperature will show martensitic R-phase and austenitic structure. (4) Cyclic fatigue fracture, the leading cause of instrument fracture occurs when the file rotates in a curved root canal in repetitive cycles of extension and compression in region of highest bending stress (5,6) . Gambarini et al2008 (7) , Praisarnti et al (8) and Zender (9) stated that fatigue resistance is of NiTi rotary is affected by material properties, cross-sectional design, metal surface treatments, metallurgical characterization and root canal irrigants.…”

Section: Introductionmentioning

confidence: 99%

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A comparative analysis of cyclic fatigue of a new preheated machined CM wire endodontic files after exposure to different irrigants

Khalil

Mallah

2019

Egyptian Dental Journal

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AIM: Analysis of cyclic fatigue of a new preheated machined CM wire MPro endodontic files after exposure to lycopene, curcumin and Soduim hypochlorite for two different immersion observation periods; 5 minutes and 10 minutes Methodology: Eighteen size 20 MPro files were used in this study, divided into three groups of 6 files each according to irrigant used: Group I lycopene, Group II curcumin and Group III Soduim hypochlorite. All files were immersed in irrigants for either 5 or 10 minutes. The cyclic fatigue tess were performed on all files of both immersion periods using a static cyclic fatigue testing device, which have an artificial stainless steel canal and tested using a custom-made static cyclic fatigue testing apparatus. Parameters recorded were time to fracture, number of cycles to failure (NCF) and mean length of fractured segments. Results: Results showed no statistically significant difference between the different irrigants at the two observation periods and within the same group regarding time to fracture, number of cycles to failure (NCF) and mean length of fractured segments. Conclusion: All tested irrigants lycopene, curcumin and Soduim hypochlorite had same effect on cyclic fatigue of the preheated machined CM wire Mpro endodontic files when used for 5 or 10minutes.

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Section: Discussioncontrasting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

A comparative analysis of cyclic fatigue of a new preheated machined CM wire endodontic files after exposure to different irrigants

Khalil

Mallah

2019

Egyptian Dental Journal

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“…In clinical practice, it is important to be aware of the effects of frequently used solutions on the surfaces of NiTi rotary files. Many studies have investigated the effects of irrigants on NiTi rotary files (Cai, Tang, & Ge, ; Prasad, Sam, & Arvind Kumar, ; Topuz et al, ). However, there have been no studies of the effects of irrigants on the surface properties of HyFlex EDM files manufactured using new EDM technology.…”

Section: Discussionmentioning

confidence: 99%

“…Many studies have used AFM to examine the effects of irrigants on the surface porosity of NiTi files and reported quantitative values and 3‐D images (Ametrano et al, ; Cai et al, ; Sağlam et al, ). In the present study, we used AFM to qualitatively and quantitatively examine changes in the surfaces of NiTi files after immersion in NaOCl and EDTA solutions.…”

Section: Discussionmentioning

confidence: 99%

Effect of Sodium Hypochlorite and EDTA on Surface Roughness of HyFlex CM and HyFlex EDM Files

Uslu

Özyürek

Yılmaz

2018

Microscopy Res & Technique

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The aim of the present study was to compare the effect of exposure to sodium hypochlorite (NaOCl) and ethylenediaminetetraacetic acid (EDTA) on the surface topography and roughness of HyFlex controlled memory (CM) and HyFlex electrical discharge machining (EDM) using atomic force microscopy (AFM). Twenty HyFlex EDM (25/.08) and 20 HyFlex CM (25/.06) files were divided into five groups (n = 4). One group served as a negative control group. The files in the other groups were exposed to 5.25% NaOCl and 17% EDTA solutions at 37 C for 5 and 10 min, respectively, and examined using AFM after each exposure. The data were analyzed using one-way ANOVA test. The lowest values were observed in the control group of HyFlex EDM files (p < .05). The highest values were observed in the HyFlex EDM and HyFlex CM files immersed in EDTA for 10 min (p < .05). In conclusion, the tested irrigants had a significant negative effect on the surface porosity of NiTi files. The immersion of NiTi files in irrigants during cleaning and sterilization procedures results in corrosion and surface deformation of the files, and this can lead to unexpected file fracture during clinical use. Thus, the investigation of effect of ethylenediaminetetraacetic acid (EDTA) and sodium hypochlorite (NaOCl) on surface topography of HyFlex files is important. K E Y W O R D S ethylenediaminetetraacetic acid, HyFlex CM, HyFlex EDM, sodium hypohlorite, surface roughness

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“…However, a high risk of instrument fracture while removing root canal filling materials has been reported (Giuliani, Cocchetti, & Pagavino, ). Research on the surface topography of endodontic files demonstrated alterations after root canal preparations (Ozyurek, Yilmaz, Uslu, & Plotino, ), sodium hypochlorite immersion (Cai, Tang, & Ge, ), and multiple autoclave cycles (Yılmaz, Uslu, Özyürek, ). To date, only one study (Can Saglam & Gorgul, ) in the literature has evaluated surface alterations of endodontic files after removing root canal filling material.…”

Section: Introductionmentioning

confidence: 99%

Atomic force microscopy and energy dispersive X‐ray spectrophotometry analysis of reciprocating and continuous rotary nickel‐titanium instruments following root canal retreatment

Kaya

Erik

Kiraz

2019

Microscopy Res & Technique

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The aim was to examine the effect of retreatment process on the surface roughness and nickel titanium (NiTi) composition of ProTaper Universal Retreatment (PTUR; consists of 3 files; D1, D2, D3) and WaveOne Gold (WOG) (primary) instruments. Twenty extracted mandibular molar teeth with severe curved (30-40 ) mesial roots were selected and divided into two groups (n = 10) based on the instrument used for the removal of the root canal filling. Before and after using the instruments in two canals, they were subjected to atomic force microscopy (AFM) and energy dispersive X-ray spectrophotometry (EDX) analysis. The EDX analysis data and roughness average (Ra) and root mean square (RMS) values were analyzed statistically using a oneway analysis of variance and post hoc Tukey's test at the 5% significant level. There was no significant difference between the new and used D1 and D2 PTUR and WOG instruments in terms of the Ni composition (p > .05). The Ti contents of the used D2 and D3 PTUR instruments were lower those of the new instruments (p < .05). In both new and used instruments, PTUR and WOG have no difference in terms of Ra and RMS values. (p > .05). The Ra and RMS values of the PTUR and WOG systems significantly increased after removal of the root canal filling (p < .05). The use of PTUR and WOG instruments for removal of root canal filling in severely curved root canals affected the surface topography of the files. The NiTi composition of the WOG instruments was unaffected by the retreatment process. K E Y W O R D S atomic force microscopy, energy dispersive X-ray spectrophotometry, nickel-titanium instruments, root canal retreatment, surface roughness

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Effect of irrigation on surface roughness and fatigue resistance of controlled memory wire nickel‐titanium instruments

Abstract: Except the HyFlex files immersed in NaOCl, the surface roughness of other files exposed to irrigants increased. However, a change in the surface tomography of CM wire instruments caused by contact with irrigants for 10 min did not trigger a decrease in cyclic fatigue resistance.

Cited by 31 publications

References 33 publications

A comparative analysis of cyclic fatigue of a new preheated machined CM wire endodontic files after exposure to different irrigants

A comparative analysis of cyclic fatigue of a new preheated machined CM wire endodontic files after exposure to different irrigants

Effect of Sodium Hypochlorite and EDTA on Surface Roughness of HyFlex CM and HyFlex EDM Files

Atomic force microscopy and energy dispersive X‐ray spectrophotometry analysis of reciprocating and continuous rotary nickel‐titanium instruments following root canal retreatment

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