Comparative Evaluation of Cyclic Fatigue Resistance of Two Single-file Rotary Instruments in Simulated Stainless Steel Curved Canals

Sedigh-Shams, Mahdi; Ebrahimi, Reyhaneh; Asheghi, Bahar; Eskandari, Fateme

doi:10.52547/jrdms.7.1.48

Cited by 2 publications

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“…The success of endodontic treatment depends on the quality and method of chemomechanical preparation, disinfection, and 3-dimensional obturation of the root canals [ 44 – 46 ]. Endodontic irrigants can alter the chemical composition of dentin by affecting its organic and inorganic phases, which can lead to a reduction in dentin microhardness and an increase in the risk of tooth fracture.…”

Section: Discussionmentioning

confidence: 99%

The effect of nanobased irrigants on the root canal dentin microhardness: an ex-vivo study

Sahebi,

Mofidi,

Abbaszadegan

et al. 2023

BMC Oral Health

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Background Given the favorable antimicrobial properties of zinc oxide (ZnONPs), standard silver (AgNPs), and imidazolium-based silver (Im-AgNPs) nanoparticles, this study aimed to evaluate their influence on the microhardness of root canal dentin. Methods In this experimental study, 40 mandibular premolars were decoronated at the cementoenamel junction and longitudinally sectioned into halves to create 80 specimens. They were randomly allocated to 5 groups (n = 16) and irrigated with ZnONPs, AgNPs, Im-AgNPs, NaOCl, or normal saline (as the negative control) for 15 min. The Vickers Hardness Number (VHN) was measured on each root canal third before and after being soaked in irrigants. Statistical analysis was performed using paired t-test, one-way ANOVA, and post hoc Tukey’s test (α = 0.05). Results Im-AgNPs and ZnONPs irrigants improved the microhardness of root dentin, whereas, AgNPs and NaOCl decreased it. ZnONPs yielded the highest VHN at the coronal third (P˂0.001), while the Im-AgNPs provided the highest VHN at the middle and apical thirds (P˂0.001). The AgNPs group showed the lowest VHN at the apical third. Conclusions The irrigants containing Im-AgNPs and ZnONPs significantly enhanced the root dentin microhardness. However, the use of AgNPs resulted in decreased microhardness.

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Section: Discussionmentioning

confidence: 99%

The effect of nanobased irrigants on the root canal dentin microhardness: an ex-vivo study

Sahebi,

Mofidi,

Abbaszadegan

et al. 2023

BMC Oral Health

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“…Eradicating or minimizing bacteria and their by-products from root canals and preventing reinfection plays a key role in root canal treatments [ 1 – 3 ]. Optimum disinfection of the root canals is accomplished by mechanical debridement supplemented with root canal irrigants and interappointment medicaments [ 4 , 5 ]. Calcium hydroxide (CH) stands among the most routinely applied intracanal dressings because of its well-documented advantages including antibacterial activities and various favorable biological properties like biocompatibility, tissue-dissolving ability, and induction of mineralized tissue [ 6 – 8 ].…”

Section: Introductionmentioning

confidence: 99%

The efficacy of EndoActivator, passive ultrasonic irrigation, and Ultra X in removing calcium hydroxide from root canals: an in-vitro study

2022

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Background This study aimed to compare the efficacy of EndoActivator, passive ultrasonic irrigation, and Ultra X in removing calcium hydroxide from the artificial grooves in root canal walls. Methods The root canals of 50 extracted human maxillary incisors were instrumented by using the ProTaper rotary system up to #F4 (size 40/0.06 ProTaper) and the teeth were split longitudinally. Lateral grooves were created in the apical and coronal parts of one half and the middle part of the other half. Calcium hydroxide paste was applied to the grooves and the root halves were reassembled. After seven days, the calcium hydroxide was removed from the canal by using one of the EndoActivator, passive ultrasonic irrigation, and Ultra X devices; one group went without irrigation (control group). The CH remnants in the grooves were scored at 20× magnification. The data were analyzed by using the Kruskal–Wallis, Dunn’s post hoc, and Friedman tests. P < 0.05 was considered to be statistically significant. Results No statistically significant difference existed among the experimental groups at the coronal and middle grooves (P > 0.05). However, Ultra X was significantly more effective than passive ultrasonic irrigation at the apical grooves (P = 0.023). Conclusion Within the limitations of this study, Ultra X can be reported to remove the calcium hydroxide from the apical third more efficiently than passive ultrasonic irrigation.

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Comparative Evaluation of Cyclic Fatigue Resistance of Two Single-file Rotary Instruments in Simulated Stainless Steel Curved Canals

Cited by 2 publications

References 0 publications

The effect of nanobased irrigants on the root canal dentin microhardness: an ex-vivo study

The effect of nanobased irrigants on the root canal dentin microhardness: an ex-vivo study

The efficacy of EndoActivator, passive ultrasonic irrigation, and Ultra X in removing calcium hydroxide from root canals: an in-vitro study

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