scholarly journals Influence of Phosphoric Acid Etching on the Bond Strength of a Universal Adhesive System to Caries-Affected Dentin

2018 ◽  
Vol 08 (03) ◽  
pp. 37-46
Author(s):  
Renata Pavanello ◽  
Sérgio Luiz Pinheiro
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Adhesive System ◽  
Acid Etching ◽  
Universal Adhesive ◽  
Phosphoric Acid Etching

scholarly journals Effect of Over-Etching and Prolonged Application Time of a Universal Adhesive on Dentin Bond Strength

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2902
Author(s):  
Phoebe Burrer ◽  
Hoang Dang ◽  
Matej Par ◽  
Thomas Attin ◽  
Tobias T. Tauböck
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Linear Regression Analysis ◽  
Acid Etching ◽  
Control Group ◽  
Application Time ◽  
Universal Adhesive ◽  
Adhesive Application ◽  
Post Hoc ◽  
Phosphoric Acid Etching

This study investigated the effect of over-etching and prolonged application time of a universal adhesive on dentin bond strength. Ninety extracted human molars were ground to dentin and randomly allocated into nine groups (G1–9; n = 10 per group), according to the following acid etching and adhesive application times. In the control group (G1), phosphoric acid etching was performed for 15 s followed by application of the universal adhesive Scotchbond Universal (3M) for 20 s, as per manufacturer’s instructions. In groups G2–5, both the etching and adhesive application times were either halved, doubled, quadrupled, or increased eightfold. In groups G6–9, etching times remained the same as in G2–5 (7.5 s, 30 s, 60 s, and 120 s, respectively), but the adhesive application time was set at 20 s as in the control group (G1). Specimens were then restored with a nanofilled composite material and subjected to microtensile bond strength testing. Bond strength data were statistically analyzed by ANOVA and Tukey’s post-hoc tests (α = 0.05). The relationship of bond strength with etching and adhesive application time was examined using linear regression analysis. Treatment of dentin with halved phosphoric acid etching and adhesive application times (G2) resulted in a significant bond strength decrease compared to the control group (G1) and all other test groups, including the group with halved acid etching, but 20 s of adhesive application time (G6). No significant differences in bond strength were found for groups with multiplied etching times and an adhesive application time of 20 s or more, when compared to the control group (G1). In conclusion, a universal adhesive application time of at least 20 s is recommended when bonding to over-etched dentin.

Repair Surface Conditioning Measures Affect Enamel and Dentin Bond Strength

2020 ◽  
Vol 45 (6) ◽  
pp. 643-654
Author(s):  
P Kanzow ◽  
L Piecha ◽  
J Biermann ◽  
A Wiegand
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Hydrofluoric Acid ◽  
Silica Coating ◽  
Acid Etching ◽  
Universal Adhesive ◽  
Universal Primer ◽  
Surface Conditioning ◽  
Etch And Rinse ◽  
Phosphoric Acid Etching

Clinical Relevance Contamination of enamel and dentin with repair surface conditioning measures should be avoided. SUMMARY Objectives: To analyze whether the contamination with different repair conditioning measures impairs the adhesive performance of a universal adhesive applied in etch-and-rinse mode (ER) or self-etch mode (SE). Methods and Materials: Bovine enamel and dentin surfaces (each subgroup n=16) were bonded with a universal adhesive in ER or SE after contamination with different repair conditioning measures (sandblasting, silica coating, hydrofluoric acid etching, self-etching ceramic primer). In half of the groups, sand-blasting, silica coating, and hydrofluoric acid etching was followed by the use of a universal primer. If the universal adhesive was applied in ER, contamination was performed either before or after phosphoric acid etching. If the universal adhesive was applied in SE, bonding was performed after contamination. In the control groups, no contamination was simulated. Shear bond strength (SBS) and failure modes of composite buildups were determined after thermal cycling (10,000 cycles, 5°C-55°C). Statistical analysis was performed using analyses of variance, Weibull statistics, and χ2 tests (p<0.05). Results: In ER, sandblasting and silica coating significantly reduced SBS (control: enamel =25.7±4.2 MPa; dentin = 22.0±5.3 MPa) only when performed after phosphoric acid etching. Contamination with hydrofluoric acid impaired SBS on enamel but not on dentin. The self-etching ceramic primer reduced SBS, but not significantly. The contamination with the universal primer had no significant effect. In SE, all repair conditioning measures except the universal primer reduced SBS (control: enamel = 20.3±5.5 MPa; dentin = 23.0±4.0 MPa). Conclusion: Contamination of enamel and dentin by repair conditioning measures potentially affects bond strength.

scholarly journals Improving the Bond Strength of Radiographically Tagged Caries Lesions In Vitro

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3702
Author(s):  
Sophia Toelle ◽  
Agnes Holtkamp ◽  
Uwe Blunck ◽  
Sebastian Paris ◽  
Falk Schwendicke
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Ethanol Solution ◽  
Interquartile Range ◽  
Acid Etching ◽  
Universal Adhesive ◽  
Bond Strengths ◽  
Phosphoric Acid Etching ◽  
Tagging Effects

After selective carious tissue removal, residual carious lesions remain radiographically detectable. Radiopaque tagging resolves the resulting diagnostic uncertainty but impedes bond strengths of adhesives to tagged dentin. We developed a protocol mitigating these detrimental effects. A 30%/50%/70% SnCl2 solution was dissolved in distilled water or a 30%/50%/90% ethanol solution (E30/60/90) and applied to artificially induced dentin lesions. Tagging effects were radiographically evaluated using transversal wavelength-independent microradiography (n = 6/group). Groups with sufficient tagging effects at the lowest SnCl2 concentrations were used to evaluate how tagging affected the microtensile bond strength of a universal adhesive (Scotchbond Universal) to sound and carious dentin (n = 10/group). Two different protocols for removing tagging material were tested: 15 s phosphoric acid etching and 5 s rotating brush application. Scanning/backscattered electron microscopy (SEM/BSE) and energy-dispersive X-ray spectroscopy (EDS) were used to assess surfaces after tagging and removal. The most promising removal protocol was revalidated microradiographically. Tagging significantly increased the radiopacity, with consistent effects for 30% SnCl2 dissolved in water or E30. Microscopically, tagged surfaces showed a thick carpet of SnCl2, and tagging reduced bond strengths significantly on carious dentin but not on sound dentin (p < 0.01). On carious dentin, removal of tagging material using acid etching and rotating brush was microscopically confirmed. Acid etching also mitigated any bond strength reduction (median: 21.3 MPa; interquartile range: 10.8 MPa) compared with nontagged dentin (median: 17.4 MPa; interquartile range: 20.6 MPa). This was not the case for brushing (median: 13.2 MPa; interquartile range: 13.9 MPa). Acid etching minimally reduced the radiographic tagging effect (p = 0.055). Phosphoric acid etching reduces the detrimental bond-strength effects of tagging without significantly decreasing radiographic tagging effects when using a universal adhesive.

scholarly journals Four chemical methods of porcelain conditioning and their influence over bond strength and surface integrity

2015 ◽  
Vol 20 (4) ◽  
pp. 51-56 ◽  
Author(s):  
João Paulo Fragomeni Stella ◽  
Andrea Becker Oliveira ◽  
Lincoln Issamu Nojima ◽  
Mariana Marquezan
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Surface Integrity ◽  
Hydrofluoric Acid ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Acid Etching ◽  
Ceramic Surface ◽  
Surface Conditioning ◽  
Phosphoric Acid Etching

OBJECTIVE: To assess four different chemical surface conditioning methods for ceramic material before bracket bonding, and their impact on shear bond strength and surface integrity at debonding.METHODS: Four experimental groups (n = 13) were set up according to the ceramic conditioning method: G1 = 37% phosphoric acid etching followed by silane application; G2 = 37% liquid phosphoric acid etching, no rinsing, followed by silane application; G3 = 10% hydrofluoric acid etching alone; and G4 = 10% hydrofluoric acid etching followed by silane application. After surface conditioning, metal brackets were bonded to porcelain by means of the Transbond XP system (3M Unitek). Samples were submitted to shear bond strength tests in a universal testing machine and the surfaces were later assessed with a microscope under 8 X magnification. ANOVA/Tukey tests were performed to establish the difference between groups (α= 5%).RESULTS: The highest shear bond strength values were found in groups G3 and G4 (22.01 ± 2.15 MPa and 22.83 ± 3.32 Mpa, respectively), followed by G1 (16.42 ± 3.61 MPa) and G2 (9.29 ± 1.95 MPa). As regards surface evaluation after bracket debonding, the use of liquid phosphoric acid followed by silane application (G2) produced the least damage to porcelain. When hydrofluoric acid and silane were applied, the risk of ceramic fracture increased.CONCLUSIONS: Acceptable levels of bond strength for clinical use were reached by all methods tested; however, liquid phosphoric acid etching followed by silane application (G2) resulted in the least damage to the ceramic surface.

scholarly journals Effect of a self-etching primer and phosphoric acid etching on the bond strength of 4-META/MMA-TBB resin to human enamel

2015 ◽  
Vol 34 (2) ◽  
pp. 219-226 ◽  
Author(s):  
Hiroshi NOGAWA ◽  
Hiroyasu KOIZUMI ◽  
Osamu SAIKI ◽  
Haruto HIRABA ◽  
Mitsuo NAKAMURA ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Acid Etching ◽  
Human Enamel ◽  
Phosphoric Acid Etching

scholarly journals Influence of previous acid etching on interface morphology and bond strength of self-etching adhesive to cavosurface enamel

2012 ◽  
Vol 06 (01) ◽  
pp. 056-062 ◽  
Author(s):  
Adriano Fonseca Lima ◽  
Vinícius Brito da Silva ◽  
Giulliana Panfiglio Soares ◽  
Giselle Maria Marchi ◽  
Flávio Henrique Baggio Aguiar ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Adhesive System ◽  
The Self ◽  
The Other ◽  
Acid Etching ◽  
Control Group ◽  
System Control ◽  
Etch And Rinse ◽  
Group 3

ABSTRACTObjectives: The aim of this study was to evaluate the (1) bond strength of a etch-and-rinse and self-etching adhesive systems to cavosurface enamel, (2) influence of the previous acid etching with phosphoric acid 35% to the self-etching adhesive application on bond strength values, and (3) analysis of the cavosurface enamel morphology submitted to different types of conditioning, with the use of a scanning electronic microscope (SEM).Methods: Twenty four human third molars were sectioned on mesio-distal direction, resulting in two slices. The specimens were ground flat with 600-grit aluminum oxide papers, and were randomly divided into three groups: Group 1 (etch-and-rinse adhesive system (control group)), Group 2 (selfetching adhesive), and Group 3 (self-etching adhesive with previous 35% phosphoric acid-etching for 15 s). Four cylinders (0.75 mm of diameter, 1 mm height) were confectioned prior to the microshear test. Four samples for each group were prepared according the cavosurface enamel treatment and were analyzed in an SEM.Results: Group 3 had the highest values on bond strength to cavosurface enamel compared to the other two groups, which presented statistically similar values. The performance of acid etching before the application of the self-etching adhesive results in an etching pattern that is different than the other groups, favoring the adhesion to the cavosurface enamel.Conclusions: Acid etching increases the bond strength values of the self-etching adhesive to cavosurface enamel, promoting a conditioning pattern that favors the adhesion to this substrate. (Eur J Dent 2012;6:56-62)

Influence of phosphoric acid etching on bond strength of adhesives

2015 ◽  
Vol 31 ◽  
pp. e8
Author(s):  
Y. Tamura ◽  
S. Shibasaki ◽  
S. Matsuyoshi ◽  
K. Tsubota ◽  
T. Takamizawa ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Acid Etching ◽  
Phosphoric Acid Etching

Effect of Phosphoric Acid Etching of Enamel Margins on the Microleakage of a Simplified All-in-One and a Self-etch Adhesive System

2009 ◽  
Vol 34 (5) ◽  
pp. 531-536 ◽  
Author(s):  
K. Khosravi ◽  
E. Ataei ◽  
M. Mousavi ◽  
N. Khodaeian
Keyword(s):  
Phosphoric Acid ◽  
Clinical Relevance ◽  
Adhesive System ◽  
Acid Etching ◽  
Self Etch ◽  
Phosphoric Acid Etching

Clinical Relevance This study evaluates the effect of phosphoric acid etching of enamel margins on the microleakage of a simplified all-in-one and a self-etching adhesive system in comparison to a conventional total-etch system.

Evaluating Various Preparation Protocols on the Shear Bond Strength of Repaired Composite

2017 ◽  
Vol 18 (3) ◽  
pp. 182-187
Author(s):  
Ayah A Al-Asmar ◽  
Khaled S Hatamleh ◽  
Muhanad Hatamleh ◽  
Mohammad Al-Rabab'ah
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Coupling Agent ◽  
Shear Bond Strength ◽  
Silane Coupling Agent ◽  
Acid Etching ◽  
Air Abrasion ◽  
Group V ◽  
Silane Coupling ◽  
Phosphoric Acid Etching

ABSTRACT Introduction The aim of this study is to evaluate the effect of different combinations of various surface treatments on the shear bond strength (SBS) of repaired composite resin. Materials and methods A total of 122 composite samples were prepared from Filtek Z350 XT. Samples were light cured and stored for 6 weeks. Surface treatment of old composite was done in five groups: Group I: bur roughening + phosphoric acid etching, group II: bur roughening + hydrofluoric acid etching + silane coupling agent, group II: air abrasion + phosphoric acid etching, group IV: air abrasion + phosphoric acid etching + silane coupling agent, group V: air abrasion + hydrofluoric acid etching + silane coupling agent. Bonding agent was applied to all surface-treated old composites and light cured. The fresh composite resin was bonded to treated surfaces and cured and stored in water at 37°C for 6 weeks. Shear bond strength was measured by a universal testing machine. Results Shear bond strength values of all groups were not statistically significant except for group V, which showed statistically significant higher SBS than group III. Conclusion Techniques with readily available materials at the clinic can attain similar SBS to more elaborate technique involving potentially hazardous materials. How to cite this article Al-Asmar AA, Hatamleh KS, Hatamleh M, Al-Rabab'ah M. Evaluating Various Preparation Protocols on the Shear Bond Strength of Repaired Composite. J Contemp Dent Pract 2017;18(3):182-187.

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