scholarly journals Cleaning and Conditioning of Contaminated Core Build-Up Material before Adhesive Bonding

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2880
Author(s):  
Karsten Klosa ◽  
Walid Shahid ◽  
Milda Aleknonytė-Resch ◽  
Matthias Kern
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Adhesive Bonding ◽  
Composite Resin ◽  
Tensile Bond Strength ◽  
Air Abrasion ◽  
Powder Surface ◽  
Surface Conditioning ◽  
Alumina Particles ◽  
Dentin Adhesive

The objective of this study was to evaluate the effects of different cleaning and conditioning procedures after contamination on the tensile bond strength (TBS) of a luting resin to a core build-up composite resin. Specimens (n = 384) made of a core build-up material were stored for 3 weeks in 37 °C water. Half of the specimens were contaminated with saliva and a disclosing silicone and then cleaned either using phosphoric acid, a pumice suspension, air-abrasion with alumina or polishing powder. Surface conditioning was performed by either using a dentin adhesive, a silane containing primer or a composite resin primer, which resulted in 24 unique combinations of 16 specimens per group. Before measuring TBS, half of the specimens of each group were stored in 37 °C water for 3d or were artificially aged for 150 days. Results show that cleaning with pumice or air-abrasion are superior methods compared to using a polishing powder or phosphoric acid. Silane is an inferior conditioning agent compared to composite or dentin primers. Ideally, after contamination, bonding surfaces should be cleaned with a pumice suspension and conditioned with a dentin adhesive. Those surfaces could also be cleaned and conditioned with air-abrasion with alumina particles and a composite resin primer.

scholarly journals Shear bond strength of enamel surface treated with air-abrasive system

2002 ◽  
Vol 13 (3) ◽  
pp. 175-178 ◽  
Author(s):  
Maria Cristina Borsatto ◽  
Alma Blásida Elisaur Benitez Catirse ◽  
Regina Guenka Palma Dibb ◽  
Telma Nunes do Nascimento ◽  
Renata Andréa Salvitti de Sá Rocha ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Aluminum Oxide ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Enamel Surface ◽  
Acid Etching ◽  
Air Abrasion ◽  
Group Iii ◽  
Group I

The aim of this study was to evaluate the shear bond strength of a composite resin to dental enamel, using three different surface treatments. Fifteen sound third molars were randomly assigned to three groups. The mesial and distal surfaces were flattened and covered using adhesive tape with a central orifice delimiting the adhesion area (7.07 mm²). Group I, the enamel surface was conditioned with 37% phosphoric acid for 15 s; group II, the surface was treated using air abrasion with aluminum oxide; group III, the enamel surface was treated using an association of air abrasion with aluminum oxide and 37% phosphoric acid. The Single Bond (3M) adhesive system was applied and a Teflon matrix was placed and filled with composite resin Z-100 (3M) and light-cured. The shear bond strength test was performed with a universal testing machine. The acid etching technique and air abrasion with aluminum oxide associated with acid etching had the highest shear bond strength values. Data were subjected to statistical analysis using ANOVA and the Tukey test, and no statistically significant difference in shear bond strength was observed between group I (12.49 ± 2.85 MPa) and group III (12.59 ± 2.68 MPa). In contrast, both groups had statistically better shear bond strengths compared to group II (0.29 ± 0.56 MPa; p<0.05). Air abrasion with aluminum oxide does not substitute acid etching. The association of these methods to obtain adequate adhesion to the substrate is necessary.

scholarly journals Effect of air abrasion on tensile bond strength of a single-bottle adhesive/indirect composite system to enamel

2007 ◽  
Vol 18 (1) ◽  
pp. 45-48 ◽  
Author(s):  
Paulo César G. Silva ◽  
Mariane Gonçalves ◽  
Telma N. do Nascimento ◽  
André Luiz B. Centola
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Adhesive System ◽  
Tensile Bond Strength ◽  
Air Abrasion ◽  
Human Enamel ◽  
Significant Difference ◽  
Strength Tests ◽  
Indirect Composite ◽  
Phosphoric Acid Etching

This study evaluated the efficiency of air abrasion alone and associated with phosphoric acid etching on tensile bond strength of a single-bottle adhesive/indirect composite restorative system (Bond 1/Alert) to human enamel. Forty enamel surfaces from extracted human third molars were assigned to 4 groups (n= 10). Mach 4.1 (Kreativ Inc.) air abrasion equipment was used for 20 s. A special system of rod pairs aligned in a specific apparatus was used for tensile strength tests, according to ISO/TR 11405 standard (1994) with some modifications. Bond strength means were: G1 (air abrasion + rinsing + condensable composite resin Alert) = 3.46 ± 0.83 MPa; G2 (air abrasion + rinsing + Bond 1 adhesive system + Alert) = 4.00 ± 1.60 MPa; G3 (air abrasion + rinsing + 37% phosphoric acid + rinsing + Bond 1 + Alert) = 20.80 ± 3.95 MPa; and G4 (37% phosphoric acid + rinsing + Bond 1 + Alert) = 17.00 ± 2.74 MPa. The statistical analysis by Kruskal-Wallis test revealed that G1 and G2 presented statistically significant difference (p< 0.05) from G3 and G4 (p<0.01) and G1 and G3 did not differ significantly (p> 0.05) from G2 and G4, respectively.

scholarly journals Comparison of different standardised bond strength tests and the influence of glycine powder treatment in composite resin repairs

2020 ◽  
Vol 10 (2) ◽  
pp. 36-43
Author(s):  
Gregor Herrmann ◽  
Susanne Reimann ◽  
Nikolaos Daratsianos ◽  
Anna Weber ◽  
Ludger Keilig ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Composite Resin ◽  
Hybrid Composites ◽  
Survival Rates ◽  
Tensile Bond Strength ◽  
Mechanical Preparation ◽  
Significant Difference ◽  
Strength Tests ◽  
Native Speakers Of English

Aim: The repair of restorations is an eligible method to extend the survival rates of intraoral restorations. There is a consensus that the old surface has to be removed before repair by the use of a sandblaster or rotating instruments. This study aimed to investigate whether a glycine powder can be used successfully in composite repair by measurement of shear and tensile bond strength according to dental standards. Methodology: The influence of mechanical preparation by no powder, 25 µm glycine powder or 50 µm aluminium-oxide powder and chemical conditioning by the use of bonding, phosphoric acid and bonding or bonding, phosphoric acid and a silane on the repair bond strength of an artificially aged nano-hybrid composite was tested according to the guidelines of DIN 13990 (2017), ISO 29022 (2013) and ISO/TS 11405 (2015). The fracture modes were evaluated by adhesive, cohesive or mixed failures. Results: There was no significant difference in the performance of the different mechanical and chemical treatments. The shear bond test according to DIN 13990 (2017) produces higher repair bond strengths (26.0±8.9 MPa) than the test described in ISO 29022 (17.9±6.3 MPa). The tensile bond strength according to ISO/TS 11405 (6.9±1.8 MPa) was the lowest. Most adhesive failures occurred with the shear test according to ISO 29022 (41%), followed by DIN 13990 (18%) and the tensile test (4%). Conclusion: For evaluating the bond strength of composites the test described in ISO 29022 is recommended, because it produces the highest percentage of adhesive failures. Nano-hybrid-composites are robust to different repair protocols.   How to cite this article: Herrmann GP, Reimann S, Daratsianos N, Weber A, Keilig L, Nadal J, Bourauel C. Comparison of different standardized bond strength tests and the influence of glycine powder treatment in composite resin repairs. Int Dent Res 2020;10(1):36-43. https://doi.org/10.5577/intdentres.2020.vol10.no2.2    Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

The effect of enamel moisture on tensile bond strength of composite resin using Single bond in total etch technique

2014 ◽  
Vol 10 (1) ◽  
pp. 59-68
Author(s):  
H Afshar ◽  
M Ghandehari ◽  
S Amiri ◽  
Z Mirzayi ◽  
M Pourali ◽  
...  
Keyword(s):  
Bond Strength ◽  
Composite Resin ◽  
Tensile Bond Strength ◽  
Single Bond

Analysis of surface conditioning methods on core-veneer bond strength of CAD/CAM zirconia restorations

2020 ◽  
pp. 1-11
Author(s):  
Anip K. Roy ◽  
Govind N. Prasad ◽  
Tushar V. Bhagat ◽  
Saurabh Chaturvedi ◽  
Vishwanath Gurumurthy ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Group Iv ◽  
Control Group ◽  
Group Iii ◽  
Surface Conditioning ◽  
Group I ◽  
Alumina Particles ◽  
Scanning Electron

BACKGROUND: The increased strength of zirconia has resulted in its widespread application in clinical dentistry. Nevertheless, the fracture of veneering porcelains remains one of the key reasons of failure. OBJECTIVE: The objective of this study was to compare and analyze the influence of surface conditioning methods on the core-veneer bond strength of zirconia restorations. METHODS: Thirty specimens of zirconia core with sizes 10 × 5 × 5 mm were layered with porcelain of sizes 5 × 3 × 3 mm. On the basis of different surface conditioning methods, four groups were made: Group I: abrasion with airborne alumina particles of 110 μm size, Group II: sandblasting with silica coated alumina particles of 50 μm in size, Group III (modified group): alteration with a coating of zirconia powder prior to sintering, and Group IV (control group): metal core specimens. The shear force of all specimens was tested using a universal testing machine with a 0.5 mm/min crosshead speed. One-way analysis of variance (ANOVA) and Tukey’s post hoc pair wise comparison (p= 0.05) were performed to analyze the shear bond strength. A scanning electron microscope was used to assess the fractured specimens. RESULTS: A statistically significant difference was noted between the groups. The mean value of shear bond strength was 40.25 MPa for Group I, 41.93 MPa for Group II, 48.08 MPa for Group III and 47.01 MPa for Group IV. CONCLUSIONS: The modified zirconia group and control group demonstrated a significantly higher mean bond strength than that of Group I, where airborne particle abrasion was used. The scanning electron microscope showed that cohesive fracture in the porcelain veneers was the main problem of failure in altered zirconia. The modified zirconia specimens in Group III demonstrated significantly improved values of shear bond strength.

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 Impact of Intracoronal Dentin Treatment Prior to Bleaching on Bond Strength of Restorative Materials

2014 ◽  
Vol 25 (6) ◽  
pp. 519-523 ◽  
Author(s):  
Erica Moreno Zanconato-Carvalho ◽  
João Felipe Bruniera ◽  
Natália Spadini de Faria ◽  
Vivian Colucci ◽  
Danielle Cristine Messias
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Surface Treatment ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Er:Yag Laser ◽  
Composite Resins ◽  
Bleaching Procedure ◽  
Significant Difference ◽  
Restorative Materials

Surface treatment of dentin before the bleaching procedure may affect its permeability and influence the bond strength of restorative materials. This study evaluated the influence of surface treatment before the bleaching on shear bond strength (SBT) of restorative materials to intracoronal dentin. Dentin slabs were subjected to surface treatment: no bleaching (control - CON), no surface treatment + bleaching (HP), 37% phosphoric acid + bleaching (PA) and Er:YAG laser + bleaching (L). After the bleaching procedure, specimens (n=10) were restored with: microhybrid composite resin (MH), flowable composite resin (F), and resin-modified glass-ionomer cement (RMGIC). The shear test was carried out. ANOVA and Tukey's test (α=0.05) showed significant difference for surface treatment and restorative materials (p<0.05). CON presented higher STB and was statistically different from HP (p<0.05). PA and L showed intermediate values and were statistically similar to CON and HP (p>0.05). STB for MH and F were higher than RMGIC (p<0.05), and did not differ from each other (p>0.05). The surface treatments with phosphoric acid and Er:YAG laser before the bleaching procedure provided shear bond strength at the same level of unbleached dentin and the composite resins presented superior bond strength to the intracoronal dentin.

scholarly journals Adhesion of Two Bonding Systems to Air-Abraded or Bur-Abraded Human Enamel Surfaces

2008 ◽  
Vol 02 (03) ◽  
pp. 167-175 ◽  
Author(s):  
Abdulkadir Sengun ◽  
Hasan Orucoglu ◽  
Ilknur Ipekdal ◽  
Fusun Ozer
Keyword(s):  
Bond Strength ◽  
Composite Resin ◽  
In Vitro Study ◽  
Air Abrasion ◽  
Adhesive Resin ◽  
Bonding Performance ◽  
Human Enamel ◽  
Bond Strengths ◽  
Bonding Systems

ABSTRACTObjectives: The purpose of this in vitro study was to evaluate whether mechanical alteration of the enamel surfaces with air abrasion and bur abrasion techniques could enhance the bonding performance of a three step and a self etching adhesive resin systems to enamel.Methods: 126 extracted lower human incisor teeth were used. The teeth were divided into three groups including 40 teeth each. First group; teeth were used as control and no preparation was made on enamel surfaces, 2nd group; outer enamel surfaces were air abraded, 3rd group; outer enamel surfaces were abraded mechanically with a diamond fissure bur. Cylinder composite resin blocks were bonded to the buccal enamel surfaces with two bonding systems (20 specimens in each group). Bond strengths to enamel surfaces were measured at a cross-head speed of 1 mm/min. The data were analyzed by ANOVA and Duncan Tests. To examine interface composite resin/enamel surfaces at scanning electron microscopy, remaining 6 teeth were used. Fracture analysis was performed using an optical stereomicroscope.Results: Bond strengths values of Solid Bond were significantly higher than bond strengths of Clearfil SE Bond for all types of enamel (P<.05). Shear bond strength values obtained with Solid Bond (three step system) to three types of enamel surfaces [air-abraded (30.25±7.00 MPa), bur-abraded (29.07±3.53 MPa), control (31.74±7.35 MPa)] were close to each other (P>.05). The macroscopic mode of failures for bonding systems, SB and SE Bond appeared to be adhesive and cohesive in nature.Conclusions: In order to get better bond strength values with self etching systems, it is advisable to prepare enamel surfaces with bur or air abrasion, but it enamel preparation is not necessary for three step systems. (Eur J Dent 2008;2:167-175)

scholarly journals A comparative study of the microtensile bond strength and microstructural differences between sclerotic and Normal dentine after surface pretreatment

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Jinhua Wang ◽  
Weijian Song ◽  
Lei Zhu ◽  
Xin Wei
Keyword(s):  
Phosphoric Acid ◽  
Bond Strength ◽  
Sodium Hypochlorite ◽  
Resin Composite ◽  
The Other ◽  
Tensile Bond Strength ◽  
Strength Analysis ◽  
Class Iii ◽  
Surface Pretreatment ◽  
Dentine Surface

Abstract Background The resin bond strength of sclerotic dentine is significantly lower than that of the normal dentine, which paused a challenge for bonding procedures clinically. The aim of this study was to compare the effects of different surface pretreatments on the micro-tensile bond strength and microstructure between sclerotic dentine and normal dentine. Methods Eighty teeth that were collected, forty premolars with typical wedge-shaped defects visually graded as class III were assigned as the sclerotic dentine group (SD), the other forty normal premolars with artificial wedge-shaped defects were assigned as the normal dentine group (ND). Each group was randomly subdivided into eight subgroups according to the solution used: 35% phosphoric acid, 15% EDTA, 5% or 10% NaClO. Then the dentine surface was examined using a scanning electron microscope (SEM). The lesions were restored using self-etching adhesive and the subsequent resin composite. The teeth were sectioned into sticks for the micro-tensile bond strength analysis, and the data were analysed using the SPSS17.0 software package (α = 0.05). Results First, for the ND groups, after pretreatment using 35% phosphoric acid, and 35% phosphoric acid + 5% or 10% sodium hypochlorite, the bonding strengths of the normal dentine were higher than that of the other groups (P < 0.05). Second, for the SD groups, after pretreatment using 35% phosphoric acid, 15% EDTA, and 35% phosphoric acid + 5% or 10% sodium hypochlorite, the bonding strengths of the sclerotic dentine were higher than that of the other groups (P < 0.05). Third, the bond strengths of the sclerotic dentine were lower than that of the normal dentine without any pretreatment (P < 0.05). After pretreatment using 35% phosphoric acid + 5% or 10% sodium hypochlorite, the bonding strengths of the sclerotic dentine were higher than that of the normal dentine (P < 0.05). SEM observation showed that the appearances of dentine surface were changed after pretreatment using the above solutions, with the reduced smear layer, opened small groove and increased dentinal tubules. Conclusion Pretreatment of dentine using 35% phosphoric acid+ 5% or + 10% sodium hypochlorite changed the microstructure of the sclerotic dentine surface and subsequently increased the micro-tensile bond strength.

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