Structural Analysis of Bovine Root Dentin after Use of Different Endodontics Auxiliary Chemical Substances

Moreira, Danna Mota; Almeida, José Flávio Affonso de; Ferraz, Caio Cézar Randi; Gomes, Brenda Paula Figueiredo de Almeida; Line, Sérgio Roberto Peres; Zaia, Alexandre Augusto

doi:10.1016/j.joen.2009.04.002

Cited by 107 publications

(128 citation statements)

References 26 publications

(27 reference statements)

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“…CHX gel has been widely used in endodontics and one of its most important features is not affecting the dentin collagen matrix [12]. The results of the present study indicate that 2% CHX gel does not interfere with the bond strength of self-adhesive resin cements.…”

Section: Discussionmentioning

confidence: 48%

“…The efficiency of adhesive systems is directly related to the dentin quality and collagen integrity. The fact that NaOCl is an efficient organic solvent that causes dissolution of dentin collagen fibrils [12,16] might explain its negative influence on the bond strength of the self-adhesive resin cement shown in this study, since collagen plays an important role in the formation of the hybrid layer.…”

Section: Discussionmentioning

confidence: 83%

“…It has been shown that 2% CHX gel does not interfere with the collagen present in the organic matrix of root dentin, while 5.25% NaOCl, whether associated or not with 17% EDTA, causes birefringence alterations of dentin collagen [12]. The preservation of the collagen fibrils is essential for the adhesion of resin materials to dentin, as they promote micromechanical retention and participate in the process of chemical union between the hydroxyapatite present in collagen fibers and some self-etching adhesive materials [13].…”

Section: Introductionmentioning

confidence: 99%

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The effect of endodontic chemicals on the retention of fiber posts luted using a self-adhesive cement

et al. 2014

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The aim of this study was to assess the effect of endodontic chemical substances on the retention of fiber posts luted using a self-adhesive cement. Single-canal human roots of 75 teeth were divided into 5 groups (n = 15). Root canals were instrumented with one of the following substances: 0.9% NaCl (control); 5.25% sodium hypochlorite; 5.25% Sodium hypochlorite + 17% EDTA; 2% chlorhexidine gel; 2% chlorhexidine gel + 17% EDTA. After chemo-mechanical preparation, fiber post cementation was performed with self-adhesive resin cement (RelyX Unicem, 3 M/ESPE). One-way ANOVA was performed followed by a multiple comparison Tukey post hoc test (α = 5%). The use of 2% chlorhexidine gel resulted bond strength statistically similar to the control group (p = 0.418), which was higher than the other groups. A final irrigation with 17% EDTA significantly reduced bond strength (p < 0.001). The use of 5.25% sodium hypochlorite negatively affected the bond strength, either with or without a final irrigation with 17% EDTA (p < 0.001). Our results suggest that 2% chlorhexidine gel used during endodontic chemo-mechanical preparation, without a final irrigation with 17% EDTA, promotes a more favorable condition to the retention of fiber posts luted using a self-adhesive cement than 5.25% sodium hypochlorite.

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Section: Discussionmentioning

confidence: 48%

Section: Discussionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

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The effect of endodontic chemicals on the retention of fiber posts luted using a self-adhesive cement

et al. 2014

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“…To svojstvo može utjecati na dubinu prodiranja smolastih monomera kroz demineraliziranu strukturu (13). Kad se upotrebljavala samo EDTA dokazana je značajno smanjena mikročvrstoća dentina (16), što može uzrokovati promjene anorganskog matriksa korijenskog dentina, stvarajući demineralizirana područja (17). Dokazano je…”

Section: Raspravaunclassified

Effect of Endodontic Irrigating Solutions on the Micro Push-out Bond Strength of a Fibre Glass Dowel

Silveira¹,

Silva²,

Dametto³

et al. 2014

Acta Stomatol Croat

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“…O NaOCl danifica a estrutura colágena da dentina e reduz a microdureza dentinária 2,3 . Além disso, é um forte agente oxidante, com ação proteolítica, e afeta negativamente o processo de adesão dos materiais obturadores à dentina 4 .…”

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Efeito do plasma de oxigênio na dentina previamente exposta ao NaOCl

Prado

Roizenblit

Pacheco

et al. 2016

Rev. odontol. UNESP

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ResumoIntrodução: O tratamento de plasma é uma tecnologia eficaz que pode manter as propriedades internas dos materiais inalteradas após o tratamento, modificando apenas a superfície. Objetivo: Avaliar o efeito do plasma de oxigênio na dentina previamente exposta ao NaOCl 6%. Material e método: Foram utilizados 60 incisivos bovinos. A coroa foi removida, a raiz foi dividida e as faces planificadas, totalizando 120 segmentos referentes ao terço cervical. As amostras foram divididas em dois grupos: controle (imersa em NaOCl 6%, lavada com água destilada, seca, imersa em EDTA 17%, lavada e seca) e plasma de oxigênio (após tratamento descrito no grupo controle, plasma de oxigênio foi aplicado por 30 s). As amostras foram avaliadas qualitativamente em relação à topografia por microscopia eletrônica de varredura, utilizando-se microfotografias com ampliação de 1.000×. O goniômetro Ramé-hart foi utilizado para a mensuração do ângulo de contato entre as superfícies e as seguintes soluções foram utilizadas: água, etilenoglicol e di-iodometano. Em seguida, a energia de superfície, representada pelas componentes polar e dispersiva, foi calculada. Avaliou-se também o escoamento dos cimentos Pulp Canal Sealer EWT (PCS) e Real Sal SE (RS) na superfície dentinária. Os dados foram analisados estatisticamente utilizando os testes Kruskal-Wallis e Mann-Whitney U (p<0,05). Resultado: O tratamento com plasma levou à formação de uma camada semelhante à smear layer na superfície dentinária. Este tratamento levou a um aumento da energia de superfície e da componente polar, favorecendo a hidrofilicidade da superfície. Entretanto, desfavoreceu o escoamento do cimento PCS e não influenciou no escoamento do cimento RS. Conclusão: O plasma de oxigênio ocasionou mudanças topográficas na superfície dentinária, favorecendo a hidrofilicidade desta. Contudo, não favoreceu o escoamento dos cimentos endodônticos na dentina.Descritores: Gases em plasma; hipoclorito de sódio; topografia; propriedades de superfície; molhabilidade. AbstractIntroduction: Plasma treatment is an effective technology since the internal properties of the material is kept unchanged after treatment, modifying only the surface. Objective: To evaluate the effect of oxygen plasma on dentin previously exposed to 6% NaOCl. Material and method: 60 bovine incisors were used. The crown was removed, the root splited and the faces planned amounting 120 segments related to the cervical third. The samples were divided into 2 groups, control (immersed in 6% NaOCl, washed with distilled water, dried, immersed in 17% EDTA, washed and dried) and oxygen plasma (after treatment described in the control group, oxygen plasma was applied for 30s). The samples were evaluated qualitatively in relation to topography by scanning electron microscopy using photomicrographs at 1000× of magnification. The Ramé-hart goniometer was used to measure the contact angle between the surfaces and the following solutions: water, ethyleneglycol, and diiodomethane. Then, surface energy, polar and dispersive compon...

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Structural Analysis of Bovine Root Dentin after Use of Different Endodontics Auxiliary Chemical Substances

Cited by 107 publications

References 26 publications

The effect of endodontic chemicals on the retention of fiber posts luted using a self-adhesive cement

The effect of endodontic chemicals on the retention of fiber posts luted using a self-adhesive cement

Effect of Endodontic Irrigating Solutions on the Micro Push-out Bond Strength of a Fibre Glass Dowel

Efeito do plasma de oxigênio na dentina previamente exposta ao NaOCl

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