Microtensile bond strength test and failure analysis to assess bonding characteristics of different adhesion approaches to ground versus unground enamel

Hipólito, Vinícius Di; Alonso, Roberta Caroline Bruschi; Carrilho, Marcela Rocha de Oliveira; Netto, Camillo Anauate; Sinhoreti, Mário Alexandre Coelho; Góes, Mário Fernando de

doi:10.1590/s0103-64402011000200006

Cited by 14 publications

(11 citation statements)

References 14 publications

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“…In self-etch approach, the shallower etching depth and less demineralization of enamel due to lower acidity, and simultaneous etching and adhesive infiltration has been reported. When comparing to acid-etching, SE adhesives create shallower and fewer resin tags 26 27 The less retentive pattern in the debonded surface of SBU in SE mode group was observed under SEM.…”

Section: Discussionmentioning

confidence: 83%

Comparison of shear bond strength of orthodontic brackets bonded with a universal adhesive using different etching methods

Shafıei

Sardarian

Fekrazad

et al. 2019

Dental Press J. Orthod.

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Objective: The aim of this study was to compare the effects of three enamel etching modes - laser-etch, self-etch and acid-etch (5, 10 and 15 s) - on bracket bonding, using a universal adhesive. Methods: Eighty-four maxillary premolars were randomly divided into seven groups (n=12) based on the etching method and the adhesive used for bracket bonding. After water storage and thermocycling, shear bond strength was measured, and adhesive remnant index scores on debonded enamel were determined. Results: There were significant differences between the seven groups regarding bond strength values (p< 0.001). The highest values were observed in universal adhesive with laser etching group, while Transbond XT with acid or laser etching, and universal adhesive used in self-etch mode demonstrated the lowest bond strength. The universal adhesive with the three different etching times presented with statistically similar results, all showing an improvement in bond strength, compared with Scotchbond universal (SBU)/SE. Conclusions: The universal adhesive evaluated in the present study demonstrated statistically similar bond strengths to conventional orthodontic adhesive in self-etch mode. The bond strength can be improved by adding an initial acid etching or laser conditioning step, although enamel damage was observed in some cases.

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Section: Discussionmentioning

confidence: 83%

Comparison of shear bond strength of orthodontic brackets bonded with a universal adhesive using different etching methods

Shafıei

Sardarian

Fekrazad

et al. 2019

Dental Press J. Orthod.

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“…Studies have also shown that bonding to ground versus unprepared enamel yields similar bond strengths of self-etching adhesives 8 . Since the evidence in the subject remains controversial, manufacturers often recommend a preliminary phosphoric acid etching step prior to the application of mild self-etch adhesives to improve the bond strength to enamel 6,12,29 .…”

Section: Introductionmentioning

confidence: 97%

Effect of phosphoric acid etching on the shear bond strength of two self-etch adhesives

Sabatini

2013

J. Appl. Oral Sci.

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Objective:To evaluate the effect of optional phosphoric acid etching on the shear bond strength (SBS) of two self-etch adhesives to enamel and dentin.Material and Methods:Ninety-six bovine mandibular incisors were ground flat to obtain enamel and dentin substrates. A two-step self-etch adhesive (FL-Bond II) and a one-step self-etch adhesive (BeautiBond) were applied with and without a preliminary acid etching to both the enamel and dentin. The specimens were equally and randomly assigned to 4 groups per substrate (n=12) as follows: FL-Bond II etched; FL-Bond II un-etched; BeautiBond etched; BeautiBond un-etched. Composite cylinders (Filtek Z100) were bonded onto the treated tooth structure. The shear bond strength was evaluated after 24 hours of storage (37ºC, 100% humidity) with a testing machine (Ultra-tester) at a speed of 1 mm/min. The data was analyzed using a two-way ANOVA and post-hoc Tukey's test with a significance level of p<0.05. A field emission scanning electron microscope was used for the failure mode analysis.Results:Both adhesives evidenced a significant decrease in the dentin SBS with the use of an optional phosphoric acid-etching step (p<0.05). Preliminary phosphoric acid etching yielded significantly higher enamel SBS for FL-Bond II (p<0.05) only, but not for BeautiBond. FL-Bond II applied to un-etched dentin demonstrated the highest mean bond strength (37.7±3.2 MPa) and BeautiBond applied to etched dentin showed the lowest mean bond strength (18.3±6.7 MPa) among all tested groups (p<0.05).Conclusion:The use of a preliminary acid-etching step with 37.5% phosphoric acid had a significant adverse effect on the dentin bond strength of the self-etch adhesives evaluated while providing improvement on the enamel bond strength only for FL-Bond II. This suggests that the potential benefit that may be derived from an additional etching step with phosphoric acid does not justify the risk of adversely affecting the bond strength to dentin.

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“…In order to improve the accuracy of bond strength evaluation, Sano et al (1) proposed the microtensile bond testing (µTBS). This test has been widely used (2,3); nevertheless, there are reports in the literature that this is not an easy method to be applied in enamel due to its brittleness and the stresses generated during specimen preparation that can lead to fracture of enamel-resin interface (4).…”

Section: Introductionmentioning

confidence: 99%

Effect of Two Microshear Test Devices on Bond Strength and Fracture Pattern in Primary Teeth

et al. 2013

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This in vitro study evaluated the influence of two devices for application of shear load in microshear tests on bond strength and fracture pattern of primary enamel and dentin. Eighty primary molars were selected and flat enamel (40 teeth sectioned mesio-distally) and dentin (40 teeth sectioned transversally) surfaces were obtained. Both surfaces were polished to standardize the smear layer. Two-step etch-and-rinse adhesive systems (Adper Single Bond and XP Bond) were used. Polyethylene tubes was placed over the bonded surfaces and filled with composite resin. The microshear testing was performed after storage in water (24 h/37 °C) using two devices for application of microshear loads: a notched rod (Bisco Shear Bond Tester) or a knife edge (Kratos Industrial Equipment). Failure modes were evaluated using a stereomicroscope. Bond strength data were subjected to ANOVA and chi-square test to compare the failure mode distributions (α=0.05). No significant differences were observed between the groups for dentin and enamel bond strength or fracture patterns (p>0.05). The predominant failure mode was adhesive/mixed. In conclusion, the devices for application of shear loads did not influence the bond strength values, regardless of adhesive system and substrate.

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Microtensile bond strength test and failure analysis to assess bonding characteristics of different adhesion approaches to ground versus unground enamel

Cited by 14 publications

References 14 publications

Comparison of shear bond strength of orthodontic brackets bonded with a universal adhesive using different etching methods

Comparison of shear bond strength of orthodontic brackets bonded with a universal adhesive using different etching methods

Effect of phosphoric acid etching on the shear bond strength of two self-etch adhesives

Effect of Two Microshear Test Devices on Bond Strength and Fracture Pattern in Primary Teeth

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