Cyclic Fatigue Resistance of Multiused Reciproc Blue Instruments during Retreatment Procedure

Şerefoğlu, Burcu; Kurt, Seniha Miçooğulları; Kaval, Mehmet Emin; Güneri, Pelin; Demirci, Gözde Kandemir; Çalışkan, Mehmet Kemal

doi:10.1016/j.joen.2019.10.024

Cited by 14 publications

(16 citation statements)

References 33 publications

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“…It is important to emphasize that the cost can be decreased with repeated use of the instruments. In contrast, as the number of uses increases, the chance of instrument fracture and the average time required for the instrumentation of the canal will increase, as the file will experience reduced surface roughness, fatigue, and cutting efficiency, as confirmed by other studies as well [ 26 , 27 ].…”

Section: Discussionmentioning

confidence: 71%

Cyclic Fatigue Resistance of Nickel–Titanium Rotary Instruments after Simulated Clinical Use

Ubaed

Bakr

2022

Applied Bionics and Biomechanics

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Objective. Cyclic fatigue occurred in the curved canal when the instrument freely rotated leading to repeated compressive and tensile stresses. This study aims to evaluate the cyclic fatigue resistance (CFR) of new and used 2Shape and AF F-One rotary instrument systems by using an artificial stainless-steel canal. Methods. A total of 80 rotary nickel–titanium (NiTi) instruments of two systems were used, 2Shape/TS2 and AF F-ONE/F5 (40 in each group). The instruments were subdivided into group A 20 instruments (10 per system) that remain unused, group B 20 instruments (10 per system) instrumented 20 root canals (each file prepared 1 canal for 2 minutes), group C 20 instruments (10 per system) instrumented 40 canals each for 2 minutes (each file prepared 2 canals), group D of 20 instruments (10 per system) prepared 60 canals each for 2 minutes (each file prepared 3 canals). After each canal instrumentation, the instruments were cleaned and sterilized by autoclave. Then, all the instruments underwent cyclic fatigue testing in an artificial stainless steel canal with a 50° canal curvature and a radius of curvature of 5 mm. The time and number of cycles to failure (NCF) were recorded. Data were analyzed using the Welch ANOVA test for intragroup comparison and the pairwise test for multiple comparisons. Results. The unused instruments of the AF F-One rotary system showed statistically higher CFR than clinically used instruments ( P < 0.05 ). 2Shape system was not affected by clinical use ( P > 0.05 ). The mean NCF of AF F-One instruments was significantly higher than the equivalent file group of 2Shape instruments ( P < 0.05 ). Conclusion. A reduction in the CFR for AF F-One instruments after use was observed when compared to the new unused file group. The 2Shape system was not affected by clinical use. AF F-One performed better in terms of NCF.

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Section: Discussionmentioning

confidence: 71%

Cyclic Fatigue Resistance of Nickel–Titanium Rotary Instruments after Simulated Clinical Use

Ubaed

Bakr

2022

Applied Bionics and Biomechanics

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“…Subsequently, the question arose regarding the limitation of the multiuse of instruments without a significant decrease in their mechanical properties. A recent study reported that Reciproc Blue R25 instruments could be used for retreatment purposes in 2 molar teeth without a significant decrease in cyclic fatigue resistance (19). This study was designed to evaluate the torsional strength of Reciproc Blue and Reciproc files after being used for retreatment of curved canals.…”

Section: Discussionmentioning

confidence: 99%

“…Both Reciproc and Reciproc Blue instrument are suggested for a single use; however, their use for the retreatment of a molar tooth corresponds to multiple use as molars have at least three canals. Several studies evaluated how much mechanical properties of thermally treated NiTi instruments are influenced by multiple uses (18)(19)(20)(21). Thermally treated Gold Wire has been evaluated and reported to provide torsional resistance to be used safely to prepare one tooth with curved canals (18).…”

Section: Introductionmentioning

confidence: 99%

“…Thermally treated Gold Wire has been evaluated and reported to provide torsional resistance to be used safely to prepare one tooth with curved canals (18). A recent study suggested that Reciproc Blue R25 can be safely used for retreatment of 2 molar teeth without a significant decrease in cyclic fatigue resistance (19); however, it is not known how much the torsional strength of the file would be affected after use. Thus, the present study was conducted to evaluate the effect of Blue thermomechanical treatment on metallurgical properties of the instruments using X-Ray diffraction (XRD), differential scanning calorimetry (DSC), Vickers microhardness (VHN) in comparison with Reciproc instruments and also test the torsional fatigue resistances of the used Reciproc and Reciproc Blue R25 files after retreatment procedures.…”

Section: Introductionmentioning

confidence: 99%

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Metallurgical characterisation and torsional resistance of blue thermomechanically treated nickel titanium instruments after simulated ex vivo retreatment procedure

et al. 2021

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To compare used and unused Reciproc Blue and Reciproc after retreatment, the instruments were used in the mesiobuccal canals of maxillary molars with curvature. The torsional resistances were tested and then unused instruments were subjected to XRD, DSC and microhardness tests. Student's t, ANOVA and Tukey's tests were performed (α-level 0.05). The torsional strength of used Reciproc Blue was not significantly different than unused ones (P > .05), while torsional strength of Reciproc decreased significantly (P < .05). DSC and XRD indicated that Reciproc Blue exhibited prominent transformation peaks corresponding austenite to R-phase. Microhardness of Reciproc was significantly higher (P < .05). A second reuse of Reciproc Blue for retreatment could be considered safe in terms of torsional strength. Blue treatment also decreased surface microhardness of the instrument and changed phase composition by increasing the R-phase.

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“…No entanto, a PDR apresentou menor resistência torcional em relação a esses instrumentos (De Menezes et al, 2017;Alcalde et al, 2017;Silva et al, 2018: Alcalde et al, 2018. III-Os instrumentos RCB e PDR são eficazes na remoção do material obturador, mas nenhum dos sistemas analisados remove completamente o material obturador (Rodrigues et al, 2016;Bago et al, 2019;Borges et al, 2019;Serefoglu et al, 2020).…”

Section: Os Principais Achados Das Pesquisas Foramunclassified

Eficácia das limas reciprocantes Reciproc Blue e ProDesign R na remoção de material obturador: Uma revisão integrativa da literatura

Farias

Limoeiro²,

Ferraz

et al. 2021

RSD

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O objetivo do presente estudo foi realizar uma revisão integrativa sobre as propriedades mecânicas dos sistemas reciprocates Reciproc Blue e ProDesign R e a eficácia desses instrumentos na remoção de material obturador no processo de retratamento endodôntico. Para tanto, foi realizada uma pesquisa na base eletrônica da PUBMED usando as seguintes combinações de termos científicos: Reciproc Blue, Prodesign R, resistance, mechanical properties, thermal treatment e endodontic retreatment. Foram identificados 64 artigos, dos quais 29 foram selecionados para o presente estudo. Os artigos analisados demonstraram a importância do tratamento térmico e de outras características das ligas na rigidez e elasticidade dos instrumentos endodônticos Reciproc Blue e ProDesign R em relação a outros sistemas. Foi observado também que os instrumentos são eficazes na remoção de material obturador do canal radicular, não sendo, no entanto, essa remoção total.

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Cyclic Fatigue Resistance of Multiused Reciproc Blue Instruments during Retreatment Procedure

Cited by 14 publications

References 33 publications

Cyclic Fatigue Resistance of Nickel–Titanium Rotary Instruments after Simulated Clinical Use

Cyclic Fatigue Resistance of Nickel–Titanium Rotary Instruments after Simulated Clinical Use

Metallurgical characterisation and torsional resistance of blue thermomechanically treated nickel titanium instruments after simulated ex vivo retreatment procedure

Eficácia das limas reciprocantes Reciproc Blue e ProDesign R na remoção de material obturador: Uma revisão integrativa da literatura

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