Dentin wetting by four adhesive systems

Rosales-Leal, Juan Ignacio; Osorio, Raquel; Holgado-Terriza, Juan A.; Cabrerizo-Vílchez, Miguel A.; Toledano, Manuel

doi:10.1016/s0109-5641(01)00014-8

Cited by 66 publications

(63 citation statements)

References 20 publications

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“…Since the primer or primer/adhesive itself is the substance performing demineralization, it is understood that the entire demineralized dentin thickness will be filled with adhesive monomers, which cannot be surely confirmed when acid application, cleaning and surface drying are performed in separate steps previously to the application of hydrophilic monomers, as it happens with the total-etch adhesive systems. 2,18,19,21,23 The tensile bond strengths provided by CSEB and OUBF to wet dentin presented statistically significant differences (23.1 MPa and 15.7 MPa, respectively). When CSEB was used on acid-etched dried dentin, the tensile bond strength was 16.4 MPa, while OUBF presented a mean of 17.6 MPa.…”

Section: One Up Bond F (Oubf -M2)mentioning

confidence: 98%

“…These products produce smear layer dissolution 2,21,23 and dentin self-controlling demineralization by pH modifications during their application. Since the primer or primer/adhesive itself is the substance performing demineralization, it is understood that the entire demineralized dentin thickness will be filled with adhesive monomers, which cannot be surely confirmed when acid application, cleaning and surface drying are performed in separate steps previously to the application of hydrophilic monomers, as it happens with the total-etch adhesive systems.…”

Section: One Up Bond F (Oubf -M2)mentioning

confidence: 99%

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Tensile bond strength of self-etching versus total-etching adhesive systems under different dentinal substrate conditions

et al. 2007

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The use of acid etchants to produce surface demineralization and collagen network exposure, allowing adhesive monomers interdiffusion and consequently the formation of a hybrid layer, has been considered the most efficient mechanism of dentin bonding. The aim of this study was to compare the tensile bond strength to dentin of three adhesive systems, two self-etching ones (Clearfil SE Bond -CSEB and One Up Bond F -OUBF) and one total-etching one (Single Bond -SB), under three dentinal substrate conditions (wet, dry and re-wet). Ninety human, freshly extracted third molars were sectioned at the occlusal surface to remove enamel and to form a flat dentin wall. The specimens were restored with composite resin (Filtek Z250) and submitted to tensile bond strength testing (TBS) in an MTS 810. The data were submitted to two-way ANOVA and Tukey's test (p = 0.05). Wet dentin presented the highest TBS values for SB and CSEB. Dry dentin and re-wet produced significantly lower TBS values when using SB. OUBF was not affected by the different conditions of the dentin substrate, producing similar TBS values regardless of the surface pretreatments. Descriptors: Dentin permeability; Dentin-bonding agents; Tensile strength.Resumo: O uso de condicionadores ácidos para desmineralizar a superfície dental e expor a rede de fibras colágenas para interdifusão dos monômeros adesivos e conseqüente formação da camada híbrida tem sido considerado o mais eficiente mecanismo de adesão dos agentes de união. O objetivo deste estudo foi comparar a resistência de união à dentina de três sistemas adesivos, dois autocondicionantes (Clearfil SE Bond -CSEB e One Up Bond F -OUBF) e um de condicionamento total (Single Bond -SB), sob três diferentes condições de substrato dentinário (úmido, seco e reidratado). Noventa terceiros molares humanos recém-extraídos foram cortados na superfície oclusal, para se remover o esmalte e formar uma parede plana de dentina. Os espécimes foram restaurados com resina composta (Filtek Z250) e submetidos ao teste de resistência de união à tração (TBS) em uma MTS 810. As médias foram submetidas à ANOVA a dois critérios e ao teste de Tukey (p = 0,05). A dentina úmida apresentou os maiores valores de TBS para os sistemas adesivos SB e CSEB. A dentina seca e a reidratada apresentaram TBS significativamente menor quando foi empregado SB. OUBF não apresentou resultados influenciados pela condição do substrato dentinário, tendo produzido TBS similares para os diferentes tratamentos de superfície. Descritores: Permeabilidade da dentina; Adesivos dentinários; Resistência à tração.

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Section: One Up Bond F (Oubf -M2)mentioning

confidence: 98%

Section: One Up Bond F (Oubf -M2)mentioning

confidence: 99%

Tensile bond strength of self-etching versus total-etching adhesive systems under different dentinal substrate conditions

et al. 2007

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“…8 Proper infiltration and polymerization of adhesive in combination with a core build-up resin is required for the success of treatment because bonding to the root canal surface is always challenged by polymerization shrinkage of the core buildup resins. 9,10 The strength of the bond between dentin and the resin composite depends on several factors, including the characteristics of the dentinal substrate and the ability of the adhesives to wet the adherend.…”

Section: Introductionmentioning

confidence: 99%

Influence of Light Intensity on Surface Free Energy and Dentin Bond Strength of Core Build-up Resins

Shimizu

Tsujimoto

Furuichi³

et al. 2015

Operative Dentistry

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SUMMARY Objective We examined the influence of light intensity on surface free energy characteristics and dentin bond strength of dual-cure direct core build-up resin systems. Methods Two commercially available dual-cure direct core build-up resin systems, Clearfil DC Core Automix with Clearfil Bond SE One and UniFil Core EM with Self-Etching Bond, were studied. Bovine mandibular incisors were mounted in acrylic resin and the facial dentin surfaces were wet ground on 600-grit silicon carbide paper. Adhesives were applied to dentin surfaces and cured with light intensities of 0 (no irradiation), 200, 400, and 600 mW/cm2. The surface free energy of the adhesives (five samples per group) was determined by measuring the contact angles of three test liquids placed on the cured adhesives. To determine the strength of the dentin bond, the core build-up resin pastes were condensed into the mold on the adhesive-treated dentin surfaces according to the methods described for the surface free energy measurement. The resin pastes were cured with the same light intensities as those used for the adhesives. Ten specimens per group were stored in water maintained at 37°C for 24 hours, after which they were shear tested at a crosshead speed of 1.0 mm/minute in a universal testing machine. Two-way analysis of variance (ANOVA) and a Tukey-Kramer test were performed, with the significance level set at 0.05. Results The surface free energies of the adhesive-treated dentin surfaces decreased with an increase in the light intensity of the curing unit. Two-way ANOVA revealed that the type of core build-up system and the light intensity significantly influence the bond strength, although there was no significant interaction between the two factors. The highest bond strengths were achieved when the resin pastes were cured with the strongest light intensity for all the core build-up systems. When polymerized with a light intensity of 200 mW/cm2 or less, significantly lower bond strengths were observed. Conclusions The data suggest that the dentin bond strength of core build-up systems are still affected by the light intensity of the curing unit, which is based on the surface free energy of the adhesives. On the basis of the results and limitations of the test conditions used in this study, it appears that a light intensity of >400 mW/cm2 may be required for achieving the optimal dentin bond strength.

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“…During wet bonding, the hydrophobic and hydrophilic monomers dissolved in solvents such as acetone, alcohol, water and/or their mixture presented different diffusivities into the narrow interfibrillar spaces of the exposed collagen network [2][3][4] . Phase separation between the hydrophobic and hydrophilic monomers made the matrix of the hybrid layer mostly hydrophilic and susceptible to hydrolytic breakdown [3][4][5][6] .…”

Section: ⅰ Introductionmentioning

confidence: 99%

“…High vapor pressure solvents such as acetone and ethanol have been used to compete with and displace water and to facilitate the permeation of monomers 20) . Although hydrophobic bisphenol-A-glycidylmethacrylate (Bis-GMA) and triethyleneglycol dimethacrylate (TEGDMA) are not chemically compatible with wet dentin 2) , the chain length-dependent surface tension of alcohols may affect the stability of collagen and control the permeation of the adhesives through the fibers 18) . In order to increase the durability of dentin adhesives, by priming the collagen network exposed after etching and rinsing procedures with organic solvents, we tried to remove water from the collagen network without collapse.…”

Section: ⅰ Introductionmentioning

confidence: 99%

The effect of priming etched dentin with solvent on the microtensile bond strength of hydrophobic dentin adhesive

Park

Bae

Kim

et al. 2009

J Korean Acad Conserv Dent

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Deterioration of long-term dentin adhesion durability is thought to occur by hydrolytic degradation within hydrophilic domains of the adhesive and hybrid layers. This study investigated the hypothesis that priming the collagen network with an organic solvent displace water without collapse and thereby obtain good bond strength with an adhesive made of hydrophobic monomers and organic solvents. Three experimental adhesives were prepared by dissolving two hydrophobic monomers, bisphenol-A-glycidylmethacrylate (Bis-GMA) and triethyleneglycol dimethacrylate (TEGDMA), into acetone, ethanol or methanol. After an etching and rinsing procedure, the adhesives were applied onto either wet dentin surfaces (wet bonding) or dentin surfaces primed with the same solvent (solvent-primed bonding). Microtensile bond strength (MTBS) was measured at 48 hrs, 1 month and after 10,000 times of thermocycles. The bonded interfaces were evaluated using a scanning electron microscope (SEM). Regardless of bonding protocols, well-developed hybrid layers were observed at the bonded interface in most specimens. The highest mean MTBS was observed in the adhesive containing ethanol at 48 hrs. With solvent-primed bonding, increased MTBS tendencies were seen with thermocycling in the adhesives containing ethanol or methanol. However, in the case of wet bonding, no increase in MTBS was observed with aging. Ⅰ. IntroductionThe bonding mechanism of dentin adhesives currently available is partly based on the micromechanical retention through formation of a hybrid layer 1) . In order to obtain consistent hybrid layers, the threedimensional structure of a collagen network should be exposed by etchant or acidic monomers. Water is required to obtain the appropriate acidity of etchants or acidic monomers. During infiltration of resin monomers, the interfibrillar space of the collagen network should be maintained by being floated in water. Therefore, as an essential component, hydrophilic monomers are incorporated into adhesives applied on dentin. From the view point of 'long-term durability' , the bonding procedure itself involves several inherent risk factors. These factors include collagen fibers denatured by strong acid, water used to float the collagen network, phase separation between the hydrophilic and hydrophobic monomers, and the resulting exposure of hydrophilic resin monomers and collagens which are weak to hydrolytic attack.During wet bonding, the hydrophobic and hydrophilic monomers dissolved in solvents such as ABSTRACT *Corresponding

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Dentin wetting by four adhesive systems

Cited by 66 publications

References 20 publications

Tensile bond strength of self-etching versus total-etching adhesive systems under different dentinal substrate conditions

Tensile bond strength of self-etching versus total-etching adhesive systems under different dentinal substrate conditions

Influence of Light Intensity on Surface Free Energy and Dentin Bond Strength of Core Build-up Resins

The effect of priming etched dentin with solvent on the microtensile bond strength of hydrophobic dentin adhesive

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