Sealer Penetration into Dentinal Tubules in the Presence or Absence of Smear Layer: A Confocal Laser Scanning Microscopic Study

Kuçi, Astrit; Alaçam, Tayfun; Yavaş, Özer; Ergul-Ulger, Zeynep; Kayaoğlu, Güven

doi:10.1016/j.joen.2014.03.019

Cited by 80 publications

(90 citation statements)

References 22 publications

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“…This layer is present to a greater or lesser extent, depending on the type of instrument employed. The smear layer comprises both organic and inorganic components 20,21 and it adheres to root canal walls, obliterating the entry of dentinal tubules and, therefore, reducing dentin permeability. 22 In fact, the results of this study suggest that the concept of smear layer should be revised, as metallic microfragments were found to be adhered to it in samples from different groups.…”

Section: Discussionmentioning

confidence: 99%

Presence of Metallic Microfragments on Dentinal Walls and Instrument Defects following Root Canal Preparation

Estrela

Decúrcio

Barletta

et al. 2017

The Journal of Contemporary Dental Practice

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Aim:To determine the presence of metallic microfragments and their elemental composition in the dentinal walls of root canals following preparation using different endodontic instruments and to assess the active cutting edges of instruments with regard to structural defects. Materials and methods:A total of 108 molar teeth were selected and prepared using different endodontic instruments. Teeth were randomly divided into nine groups of 12 teeth each, according to the instruments employed: Manual systems -K-FlexoFile, K-File, and Hedstroem; rotary systems -ProTaper Next, Mtwo, BioRaCe; and reciprocating systems -Reciproc, Unicone, and WaveOne. Both root canals and instruments were assessed using scanning electron microscopy, and the elemental composition of metallic microfragments was determined using energy-dispersive X-ray spectroscopy.Results: Metallic microfragments were found in the groups prepared with both manual and reciprocating instruments, with no statistically significant differences between groups, thirds, or presence of metallic microfragments (p ≥ 0.05). Moreover, all groups presented structural defects in both new and used instruments; however, rotary instruments (ProTaper Next, Mtwo 702, BioRaCe) were the ones with the lowest number of defects, at statistically significant differences in comparison with other instruments (p < 0.05). Conclusion:The presence of metallic microfragments on dentinal walls following root canal preparation was associated with Considering the outcomes measured in this study, rotary instruments performed better than the other two groups, as they were associated with the lowest number of metallic microfragments and structural defects. Presence of Metallic Microfragments on Dentinal Walls and Instrument Defects following Root Canal PreparationClinical significance: During root canal preparation, operative procedures may induce changes to the root canal shape, as well as the release of metallic fragments resulting from the action of instruments on dentinal walls. Therefore, it is important to determine, among the different techniques used for this purpose, which ones are least susceptible to this occurrence.

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Section: Discussionmentioning

confidence: 99%

Presence of Metallic Microfragments on Dentinal Walls and Instrument Defects following Root Canal Preparation

Estrela

Decúrcio

Barletta

et al. 2017

The Journal of Contemporary Dental Practice

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“…11 On the other hand, MTA Fillapex has greater ability to penetrate within the dentinal tubules when cold lateral condensation technique is performed. 10 The dentinal tubules penetration of this sealer is proportional to its flow capacity, thereby, determining its effectiveness on filling of root canal in its entire length, including lateral and accessory canals; and possible irregularities in root canal walls. 10 In this study, all teeth were filled using a thermoplastic technique, which might have affected the sealer compaction in root canal.…”

Section: Discussionmentioning

confidence: 99%

“…10 The dentinal tubules penetration of this sealer is proportional to its flow capacity, thereby, determining its effectiveness on filling of root canal in its entire length, including lateral and accessory canals; and possible irregularities in root canal walls. 10 In this study, all teeth were filled using a thermoplastic technique, which might have affected the sealer compaction in root canal. Because of the pseudoplastic nature of the sealer, the force used in cold compaction decreases its viscosity, making it to flow more efficiently, and reach critical areas within the root canal.…”

Section: Discussionmentioning

confidence: 99%

“…7 According to the manufacturer, such sealer mixes the excellent biological features of MTA to the sealing ability of modern resin-based root canal sealers. Studies have reported that this sealer is biocompatible, 8 has adequate antimicrobial properties, 9 excellent flow ability to penetrate within the dentinal tubules 10,11 and good adhesiveness. 12,13 However, some physical-chemical properties, such as the high solubility and disintegration, and the presence of gaps in the sealer/dentin interface; compromise its performance.…”

Section: Introductionmentioning

confidence: 99%

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Microleakage of different root canal sealers in absence of a coronal restorative material

Martins¹,

Bastos²,

Garrido³

et al. 2017

j.rpemd

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a b s t r a c t a r t i c l e i n f oMethods: Sixty-six mandibular premolars were prepared and randomly distributed into three groups, according to the root canal sealer used for filling, as follows: G1 AH Plus (Dentsply-Maillefer), G2 MTA Fillapex (Ângelus) and Sealapex (Kerr Corporation). After one week in an oven (37°C, 100% humidity), the teeth were immersed in India ink for 15 and 30 days (n = 10), and then submitted to diaphanization to verify the amount of coronal microleakage using an operating microscope. The values were statistically analyzed using Kruskal-Wallis test (p < 0.05).Results: MTA Fillapex had the highest coronal microleakage values, in both periods (15 and 30 days). Coronal microleakage mean values were only significant in comparison with AH Plus group at the 15 day-period (p < 0.05).Conclusions: None of the tested cements was able to prevent coronal microleakage. However, MTA Fillapex had the worst results at 15 days. Métodos: Sessenta e seis pré-molares inferiores foram preparados e distribuídos aleatoriamente em três grupos, de acordo com o cimento endodôntico utilizados para obturação, da seguinte maneira: G1 AH Plus (Dentsply-Maillefer), G2 MTA Fillapex (Ângelus) e Sealapex (Kerr Corporation). Depois de uma semana em estufa (37°C, 100% de humidade relativa), os dentes foram imersos em corante durante 15 e 30 dias (n = 10), e em seguida, submetidos a diafanização para verificar a quantidade de infiltração coronária utilizando microscópio operatório.

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“…[8][9][10] In a previous study, similarly, we found that a 5% EDTA solution effectively removed the smear layer, and this allowed greater depth of tubule penetration for a mineral trioxide aggregate-based, salicylate resin root canal sealer. 11 However, little is known about the effects of lower EDTA concentrations on the dentinal microhardness. 12 Therefore, the aim of this study was to evaluate the dentinal microhardness effects and smear layerand debris-removal abilities of 5% and 17% EDTA solutions when used as final irrigants in instrumented root canals.…”

Section: Original Research Articlementioning

confidence: 99%

Son yıkamada kullanılan %5 ve %17 EDTA çözeltilerinin smear tabaka ve debriz uzaklaştırma etkinliklerinin ve dentin mikrosertliğine etkilerinin karşılaştırılması: in vitro çalışma

Kökçü¹,

Güral²,

Altunkaynak³

et al. 2016

Acta Odontol Turc

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OBJECTIVE: The aim of this in vitro study was to evaluate the effects on dentinal microhardness, and the smear layer-and debris-removal properties, of 5% and 17% ethylenediaminetetraacetic acid (EDTA) solutions when used as final irrigants. MATERIALS AND METHOD:Seventy extracted single-root human mandibular premolars were endodontically instrumented and distributed into 4 groups, according to the final irrigant: G1: 17% EDTA + 2.6% NaOCl (applied for 3 min and 1 min, respectively), G2: 5% EDTA + 2.6% NaOCl, G3 (control): saline + 2.6% NaOCl, and G4 (control): saline. Teeth from G1-G3 were split longitudinally, and scanning electron micrographs were obtained at 2 and 6 mm from the apex for smear layer and debris analyses. Teeth in all groups were sectioned horizontally, and Vickers microhardness values were measured at 500, 1000, and 1500 µm from the canal lumen. Data were statistically analyzed at the p<0.05 level. RESULTS:Smear layer scores were significantly greater at the 2-mm vs the 6-mm level in both EDTA groups, with no significant difference between EDTA groups at either level. Significantly less smear layer was found in the 17% EDTA group compared to the control at the 2-mm level. A statistically significant difference in microhardness among groups was found only at the 1500-µm level, with the 17% EDTA group exhibiting the lowest microhardness values.CONCLUSION: The 5% and 17% EDTA solutions were equally effective at removing the smear layer and debris from instrumented root canal surfaces. However, the 5% EDTA solution did not decrease the microhardness of dentin like 17% EDTA.

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Sealer Penetration into Dentinal Tubules in the Presence or Absence of Smear Layer: A Confocal Laser Scanning Microscopic Study

Cited by 80 publications

References 22 publications

Presence of Metallic Microfragments on Dentinal Walls and Instrument Defects following Root Canal Preparation

Presence of Metallic Microfragments on Dentinal Walls and Instrument Defects following Root Canal Preparation

Microleakage of different root canal sealers in absence of a coronal restorative material

Son yıkamada kullanılan %5 ve %17 EDTA çözeltilerinin smear tabaka ve debriz uzaklaştırma etkinliklerinin ve dentin mikrosertliğine etkilerinin karşılaştırılması: in vitro çalışma

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