Hybrid layer thickness and resin tag length of a self-etching adhesive bonded to sound dentin

Sundfeld, Renato Herman; Valentino, Thiago Assunção; Alexandre, Rodrigo Sversut de; Briso, André Luiz Fraga; Sundefeld, Maria Lúcia Marçal Mazza

doi:10.1016/j.jdent.2005.01.011

Cited by 29 publications

(40 citation statements)

References 11 publications

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“…They are generally considered to be less technique-sensitive compared to systems that utilize separate acid etching and rinsing steps. In fact, Sundfeld et al in 2005 21) , using a methodology proposed by Tay et al in 1995 22) utilized light microscopy to observe the application of selfetching adhesive Adper Prompt L Pop on an intact dentin tissue and showed that such aggressive self-etching capable of deminer- …”

Section: Resultsmentioning

confidence: 99%

“…However, new materials and methods continue to be proposed for the etching of dental tissues. These have included two-bottle adhesive systems, one-bottle systems 21) , and self-etching adhesives for both enamel and dentin, which eliminates the need for an etchant, thus allowing a procedural simplification and time to be saved 3,5,9,[12][13][14] . The application of self-etching adhesives to an enamel surface remains a controversial issue, particularly with regard to their application to unground enamel.…”

Section: Introductionmentioning

confidence: 99%

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Resin Tag Length of One-Step and Self-Etching Adhesives Bonded to Unground Enamel

Sundfeld

Oliveira

Silva

et al. 2005

Bull. Tokyo Dent. Coll.

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Length of resin tags yielded by utilization of an one-step conventional adhesive system and self-etching adhesive system on unground enamel was observed. In study Groups I and III, the enamel surface was etched for 60 seconds with 35% phosphoric acid gel and adhesive systems PQ1 (Ultradent Products, Inc) and Adper Prompt L Pop (3M/ESPE) were applied. Adper Prompt L Pop (3M/ESPE) was also applied in Group II in accordance with the manufacturer's recommendations. After application of these adhesive systems to dental enamel, specimens were prepared for light microscopy analysis to ascertain degree of penetration ‫.)004ן(‬ The results were submitted to an analysis of variance at the 5% level; whenever there was significance, the Tukey test was applied at the 5% level. It was found that acid etching prior to application of conventional and self-etching adhesive materials provided higher penetration of the adhesive into the unground enamel surface compared to that achieved solely by application of self-etching adhesive.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Resin Tag Length of One-Step and Self-Etching Adhesives Bonded to Unground Enamel

Sundfeld

Oliveira

Silva

et al. 2005

Bull. Tokyo Dent. Coll.

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“…23 It has been hypothesized that more uniform adhesive infiltration and greater solvent/water evaporation would be achieved when bonding with double layering 13,24 or by a prolonged application time of the primers/adhesives onto the dentin surface. 22,[25][26] Therefore, the current study determined the effect of duplicating the coats or extending the application time of self-etch bonding systems on dentin microtensile bond strength (MTBS). The null hypothesis tested was: 1) there is no difference in attained MTBS to dentin between the tested adhesives and 2) duplicating the number of adhesive layers or doubling their application time does not affect MTBS to dentin of any of the selfetch adhesives tested.…”

Section: Introductionmentioning

confidence: 99%

Effect of Double Layering and Prolonged Application Time on MTBS of Water/Ethanol-based Self-etch Adhesives to Dentin

Erhardt¹,

Osorio²,

Pisani-Proença³

et al. 2009

Operative Dentistry

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SUMMARYOne way of possibly improving bond strength is by changing the application mode of self-etch adhesives. The current study evaluated the resin-dentin microtensile bond strength (MTBS) promoted by two-and one-step self-etching adhesives after different bonding application procedures. Flat dentin surfaces from extracted human molars were bonded: 1) according to the manufacturers' instructions, 2) duplicating the number of adhesive coats and 3) doubling the application time of the acidic primers. Two-step (Clearfil SE Bond/SEB and Resulcin AquaPrime/RE) and one-step (Etch & Prime 3.0/EP and One-Up Bond F/OUB) self-etch adhesives were used. Resin-dentin beams were tested in tension at 0.5 mm/minute. Selected debonded beams were observed under scanning electron microscopy (SEM). MTBS data were analyzed by ANOVA and multiple comparison tests (p<0.05). Clinical RelevanceProblems related to the chemical formulation and/or chemical dispersion of hydrophilic/hydrophobic components in one-step self-etch adhesives limit their efficacy and are not easily solved by changing the different bonding application parameters. 572Operative DentistryThe highest MTBS was always attained with SEB, regardless of the bonding procedure. RE, EP and OUB showed similar MTBS when bonded as per the manufacturers' instructions. The MTBS of OUB increased after doubling the application time and duplicating the adhesive coats. The two-step self-etch adhesives were insensible to changes in bonding application procedures. Attempts to improve the bonding performance of water/ethanol-based self-etching systems by using different bonding application parameters were system-specific and only effectively detected in one-step adhesive systems. INTRODUCTIONThe use of self-etching agents eliminates the conditioning, rinsing and drying steps that have been shown to be both critical and difficult to standardize in operative conditions, because of the instability of the demineralized dentin matrix.1-2 Two-step self-etching primers combine the acid and the primer in one solution to form an acidic monomer, followed by the application of a resin monomer.3 One-step self-etching adhesives were developed in order to shorten the bonding procedure and reduce the sensitivity of the technique, 4 since all of the components are blended in one solution.

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“…These results are in accordance with the existing literature. 18 Some authors [31][32][33][34] have already tried to improve the results found with self-etching adhesive systems, but they failed. Theoretically, these self-etching adhesive systems are the better way to avoid nanoleakage 35 but, in fact, they still present many failures and their use should be avoided while new studies are conducted to improve their results.…”

Section: Discussionmentioning

confidence: 99%

SEM Evaluation of the Hybrid Layer After Cavity Preparation with Er:YAG Laser

Barceleiro

Dias²,

Sales³

et al. 2008

Operative Dentistry

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SUMMARYThis study compared the thickness of the hybrid layer formed using Scotchbond Multi-Purpose Plus, Single Bond 2, Prime & Bond 2.1 and Xeno III on a dentin surface prepared with a diamond bur in a high speed handpiece or prepared with an Er:YAG laser used with two parameters of pulse energy (200 and 400 mJ) and two parameters of frequency (4 and 6 Hz). Flat dentin surfaces obtained from 20 human third molars were treated with the two methods and were then prepared with the dentin adhesive systems according to the manufacturers' instructions. After a layer of composite was applied, the specimens were sectioned, flattened, polished and prepared for Scanning Electronic Microscopy observation. Five different measurements of the hybrid layer thickness were obtained along the bonded surface in each specimen. The results were statistically analyzed using Analysis of Variance and Student-Newman-Keuls tests (p≤0.05). When analyzing the hybrid layer thickness and comparing the cavity preparation method, four groups were formed: Group I (diamond bur) > Group II (Laser 200 mJ/4 Hz) = Group III (Laser 200 mJ/6 Hz) > Group IV (Laser 400 mJ/4 Hz) > Group V (Laser 400 mJ/6 Hz). When comparing the dentin adhesive systems, there were no statistically significant differences. These results showed that the four tested dentin adhesive systems produced a 2.90 ± 1.71 µm hybrid layer in dentin prepared with a diamond bur. This hybrid layer was regu- MO Barceleiro • KRHC Dias • HX Sales BC Silva • CG Barceleiro Clinical RelevanceThe thinner, irregular hybrid layer found when a cavity is prepared with the Er:YAG laser may have a negative effect on bonding. 295 lar and routinely found. In the laser groups, the dentin adhesive systems produced hybrid layers ranging from 0.41 ± 1.00 µm to 2.06 ± 2.49 µm, which were very irregular and not routinely found. It was also concluded that the Er:YAG laser, with the parameters used in this experiment, has a negative influence on the formation of a hybrid layer and cavity preparation methods influence formation of the hybrid layer.

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Hybrid layer thickness and resin tag length of a self-etching adhesive bonded to sound dentin

Cited by 29 publications

References 11 publications

Resin Tag Length of One-Step and Self-Etching Adhesives Bonded to Unground Enamel

Resin Tag Length of One-Step and Self-Etching Adhesives Bonded to Unground Enamel

Effect of Double Layering and Prolonged Application Time on MTBS of Water/Ethanol-based Self-etch Adhesives to Dentin

SEM Evaluation of the Hybrid Layer After Cavity Preparation with Er:YAG Laser

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