Smear layer removal by root canal irrigants

Garberoglio, Riccardo; Becce, Carlo

doi:10.1016/0030-4220(94)90069-8

Cited by 135 publications

(36 citation statements)

References 26 publications

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“…However, it does not act on the inorganic portion of dentin, which constitutes great part of the smear layer 9 . EDTA, according to Zaccaro, et al 36 (2010), presents a softening effect on dentinal walls that helps the instrumentation of the canals and has proven efficiency in the removal of the smear layer.…”

Section: Discussionmentioning

confidence: 99%

“…A probable explanation for this fact is the superficial morphology of dentin treated with NaOCl, which does not remove the smear layer and expose the dentinal tubules 9 . The self-etching adhesive system has modified phosphoric acid on its composition (with high initial acidity) that incorporates the smear layer available on surface and forms the hybrid layer, increasing the bond resistance.…”

Section: Discussionmentioning

confidence: 99%

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Influence of sodium hypochlorite and edta on the microtensile bond strength of a self-etching adhesive system

et al. 2010

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Chemical substances used during biomechanical preparation of root canals can alter the composition of dentin surface and affect the interaction with restorative materials.ObjectiveThe purpose of this study was to evaluate the microtensile bond strength (µTBS) of a self-etching adhesive system to dentin irrigated with sodium hypochlorite (NaOCl) and ethylenediaminetetraacetic acid (eDTA).Material and MethodsThirty human third molars were sectioned 3 mm below the occlusal surface, polished with 600- to 1200-grit silicon carbide papers, and randomly divided into 3 groups: G1 (control): no irrigating solution; G2: 1% NaOCl; and G3: 1% NaOCl followed by the application of 17% eDTA. The specimens received the self-etching adhesive system (XeNO III - Dentsply), restored with microhybrid composite resin (Z250 - 3M ESPE), sectioned and trimmed to create 4 hourglass-shaped slabs of each tooth. The slabs were tested in microtensile strength in a universal testing machine (emic DL 2000) at a crosshead speed of 0.5 mm/min until fracture. The results were analyzed statistically by ANOVA and Newman-Keuls test.ResultsMean µTBS values and standard deviations in MPa were: G1 = 11.89 ± 4.22; G2 = 19.41 ± 5.32; G3 = 11.34 ± 4.73. 1% NaOCl increased the adhesive resistance significantly (p<0.001/ F=22.5763). The application of 1% NaOCl/17% eDTA resulted in statistically similar µTBS to the control group.ConclusionsNone of the irrigants affected negatively the µTBS of XeNO III to dentin. The use of 1% NaOCl alone resulted in higher bond strength than the other treatments. The combination of 1% NaOCl and 17% eDTA produced similar bond strength to that of untreated dentin.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Influence of sodium hypochlorite and edta on the microtensile bond strength of a self-etching adhesive system

et al. 2010

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“…The least debris removal occurred with 5% PA, but this was attributed to the low concentration (30). The selection of a higher concentration of PA as the conditioning agent in this present study was based on the finding that 32% PA achieved complete smear layer removal in instrumented root canals and also on the results of studies that investigated the demineralization depth, micro-tensile bond strength, and composite resin adhesion to dentin, which showed that PA concentrations of 37% consistently produced high adhesive bond strengths (28,32,33).…”

Section: Discussionmentioning

confidence: 92%

“…However, few studies that compared the effects of various endodontic irrigating solutions on root canal dentin, included PA in their analyses (28)(29)(30)(31). A partial removal of the smear layer within the root canal was achieved with 10% PA, and complete removal was achieved with 32% PA (28).…”

Section: Discussionmentioning

confidence: 99%

Methacrylate Resin Adhesion in Root Canals Conditioned with Phosphoric Acid and Ethylenediaminetetraacetic Acid

Fiore¹,

Phebus²,

Himel³

et al. 2017

Eur Endod J

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Objective: The purpose of this study was to determine the ability of a methacrylate resin dentin bonding agent to adhere to the dentin surfaces of prepared and conditioned root canals with either 32% phosphoric acid (PA) or 17% ethylenediaminetetraacetic acid (EDTA). Methods: Prior to the application of the methacrylate resin, the root canals of 54 intact, caries-free, single-rooted, de-crowned, extracted human maxillary incisor and canine teeth were endodontically prepared and conditioned with either 32% PA or 17% EDTA or with distilled water as the unconditioned control. The resin-treated roots were cross-sectioned at three levels and scanning electron microscope (SEM) imaged for circumferential views of the root canals at 60-90× magnification and site-specific views at 250× magnification, and then randomly coded for independent and blind evaluation by four calibrated examiners. The circumferential surface of the root canals that showed no resin adhesion were digitally measured and subtracted from the digitally measured total root canal circumference, and resin adhesion was expressed as a percentage of the circumference. Results: The mean percentages of resin adhesion were 97% for the PA group, 94% for the EDTA group, and 76% for the control group. There were statistically significant differences among the PA, EDTA, and control groups. Conclusion: Root canals conditioned with 32% PA or 17% EDTA had more resin adhesion than unconditioned root canals. Root canals conditioned with 32% PA had more resin adhesion than those conditioned with 17% EDTA.

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“…[12] This could be attributed to the anatomy and lack of penetration Mahajan, et al: Eff ect of EDTA and MTAD on smear layer and root canal dentin of irrigants in the apical portion of the canals. [17] In this respect, we found that MTAD performs better than EDTA. This may also be attributed to the synergistic action of citric acid, doxycycline, and detergent present in MTAD.…”

Section: Discussionmentioning

confidence: 93%

The effect of 17% EDTA and MTAD on smear layer removal and on erosion of root canal dentin when used as final rinse: An in vitro SEM study

Mahajan

Kamra²,

Dahiwale³

2010

J Int Clin Dent Res Organ

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Smear layer removal by root canal irrigants

Cited by 135 publications

References 26 publications

Influence of sodium hypochlorite and edta on the microtensile bond strength of a self-etching adhesive system

Influence of sodium hypochlorite and edta on the microtensile bond strength of a self-etching adhesive system

Methacrylate Resin Adhesion in Root Canals Conditioned with Phosphoric Acid and Ethylenediaminetetraacetic Acid

The effect of 17% EDTA and MTAD on smear layer removal and on erosion of root canal dentin when used as final rinse: An in vitro SEM study

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