Effect of smear layer thickness and acidity of self-etching solutions on early and long-term bond strength to dentin

Reis, Alessandra; Grandi, Viviane; Carlotto, Larissa; Bortoli, Giana; Patzlaff, Rafael Tiago; Accorinte, Maria de Lourdes Rodrigues; Loguércio, Alessandro Dourado

doi:10.1016/j.jdent.2004.12.003

Cited by 127 publications

(130 citation statements)

References 28 publications

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“…These results are in agreement with other studies that showed the highest shear bond strength values with a totaletch technique [25,26]. When applying self-etching adhesives, it was shown that additional or extended etching on sound dentin did not improve the tensile bond strength [27].…”

Section: Disscussionsupporting

confidence: 92%

Influence of dentin and enamel pretreatment with acidic sulfur compounds on adhesive performance

et al. 2012

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Objective: This study tested the potential hampering effects of acidic sulfur compounds (ASC) containing hydroxybenzene sulfonic acid, hydroxymethoxybenzene sulfonic acid and sulfuric acid, prior to self-etch and etchand-rinse bonding procedures on enamel and dentin. According to the manufacturer, ASC should be applied after cavity preparation and prior to application of a primer in order to reduce the remaining biofilm in the preparation cavity. Despite promoted marketing, data on the investigated liquid are almost completely lacking. Material and Methods: One-hundred-and-fifty-two extracted mandibular bovine incisors were embedded and polished to expose either enamel (E) or dentin (D). Then, specimenswere randomly divided and conditioned as follows (n=12/group): ASC and consecutive phosphoric acid application (E1/D1), ASC (E2/D2; E5/D5), phosphoric acid (E3/D3) and no conditioning (E4/D4; E6/D6). Groups were then treated with either Optibond FL® (etch-and-rinse; 1-4) or Clearfil SE Bond® (self-etch; 5-6).Hollow acrylic cylinders were bonded with a hybrid composite resin (Filtek Supreme XTE®) to the specimens and the shear bond strength was measured (1mm/min). In addition, failure types were assessed. Descriptive statistics and statistical analyses were performed with one-way ANOVA followed by the Scheffé post-hoc test. Results:For enamel, the highest shear bond strengths values were obtained applying routine bonding procedures (23.5 ± 5.6 MPa for etch-and-rinse and 26.0 ± 6.0 MPa for selfetch respectively). In contrast, dentin pre-treatment with a combination of ASC and phosphoric acid led to the highest shear-bond values (22.8 ± 4.1 MPa). Conclusion:This study shows that ASC prior to dental restoration placement cannot be recommended for etch-and-rinse procedures on enamel, but is appropriate for dentin without interfering with routine bonding procedures. Clinical Relevance:The application of acidic sulfur compounds prior to adhesive restoration placement should be restricted to dentin only as it may negatively influence shear bond strength on sound enamel.

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Section: Disscussionsupporting

confidence: 92%

Influence of dentin and enamel pretreatment with acidic sulfur compounds on adhesive performance

et al. 2012

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“…52 SIL adhesive system can be considered a ''mild'' self-etch adhesive, which is known to have lower bond strength in comparison to the etch-and-rinse adhesives of AL and Z. [53][54][55] Moreover, the stiffness of the uncured composite during bulk placement is thought to interfere with the close adaptation of SIL to the cavity walls, resulting in air bubbles observed at the composite-dentin interface, and might have led to failure at lower bond strength, as was reported in a recent study, 51 in which the l-TBS of SIL was found to be influenced by factors other than polymerization shrinkage. On the other hand, it was suggested by another study 56 that better bond durability may be expected with aging when using silorane-based resin systems, and this improved bond durability was attributed to the complete absence of water trees with silorane; these water trees had been seen immensely infiltrating into the hybrid and adhesive layers of methacrylate-based composite.…”

Section: Discussionmentioning

confidence: 99%

Effect of C-factor on Microtensile Bond Strengths of Low-Shrinkage Composites

El-Sahn

El-Kassas

El-Damanhoury

et al. 2011

Operative Dentistry

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SUMMARY This study evaluated the microtensile bond strength (μ-TBS) of low-shrinkage composites with their corresponding adhesive systems, Filtek Silorane/Silorane adhesive (SIL, 3M ESPE AG, Seefeld, Germany) and Aelite LS/One-Step Plus (AL, BISCO Inc, Schaumburg, IL, USA) in cavities with different C-factors. Filtek Z250/Adper Single Bond Plus (Z, 3M ESPE, St Paul, MN, USA) was used as a control. Method Standardized Class I cavities were prepared in extracted human molars after removing occlusal enamel. Cavities were assigned into six different C-factors by applying nail polish to four walls, three walls, two walls adjacent to each other, two walls opposite to each other, one wall, or no walls. Resin composites with their corresponding adhesive systems were applied according to manufacturer instructions. Specimens were sectioned to obtain four rectangular beams from the center of the restorations and μ-TBS was measured. Data were analyzed by Weibull survival analysis. Shrinkage stresses of the resin composites were determined after 30 minutes from the start of light-curing using a tensometer testing machine. Flexure elastic modulus was determined using standard procedures, in accordance with ISO 4049. Data for shrinkage stress and elastic modulus were analyzed by one-way analysis of variance followed by a Tukey multiple-comparisons test (p<0.05). Results μ-TBS of both SIL and AL were not affected by different C-factors; however, the bond strength of Z decreased significantly when the C-factor increased. Shrinkage stress results were 0.94±0.1, 1.79±0.18, and 2.14±0.23 MPa for SIL, AL, and Z, respectively. The flexural modulus of both the SIL and the AL was significantly lower than that of Z. Conclusions Increasing C-factor did not negatively affect the bond strength of low-shrinkage composites.

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“…Other features, individual for each self-etch system, can be responsible for such differences. For instance, variations in adhesive viscosity, surface tension, chemical interaction of acidic monomers with enamel, 26 water concentration 24 and cohesive strength of the adhesives 10,13,28 are important features to be considered.…”

Section: Discussionmentioning

confidence: 99%

“…5,25,29 Some hypotheses can explain the lower performance of acidic self-etch systems as follows: 1) the amount of solvent presented in the self-etch primer and 2) the hydrophilic nature of the adhesive resin placed over the self-etch primer. 13,30 In addition, Tyrian SPE + One Step Plus also lacks monomers, which are capable of promoting chemical adhesion to dental substrate. Clearfil SE Bond, a mild two-step self-etch system with successful in vitro [24][25]31 and in vivo investigations 32-33 has 10-methacryloxydecyl dihydrogen phosphate (10-MDP) as an acidic monomer, which has bonding potential to the calcium of residual hydroxyapatite.…”

Section: Discussionmentioning

confidence: 99%

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Durability of Enamel Bonding Using Two-step Self-etch Systems on Ground and Unground Enamel

Loguércio

Moura²,

Pellizzaro³

et al. 2008

Operative Dentistry

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The effect of surface preparation was adhesive-dependent. Improvements in resin-enamel bond strength after enamel preparation were observed only for AdheSE and Optibond Solo plus SelfEtch Primer. Among the self-etch systems, mild, self-etch Clearfil SE Bond showed the highest bond strength values. No degradation of resin-enamel bonds was observed after 12 months of water storage, regardless of the adhesive tested. SUMMARY

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Effect of smear layer thickness and acidity of self-etching solutions on early and long-term bond strength to dentin

Cited by 127 publications

References 28 publications

Influence of dentin and enamel pretreatment with acidic sulfur compounds on adhesive performance

Influence of dentin and enamel pretreatment with acidic sulfur compounds on adhesive performance

Effect of C-factor on Microtensile Bond Strengths of Low-Shrinkage Composites

Durability of Enamel Bonding Using Two-step Self-etch Systems on Ground and Unground Enamel

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