Influence of matrix type on microshear bond strength test

Dental Cadmos ◽  
2016 ◽  
Vol 84 (5) ◽  
pp. 314-318 ◽  
Author(s):  
H. Heringer Vieira ◽  
A. Catelan ◽  
D. Alves Nunes Leite Lima ◽  
F.H. Baggio Aguiar ◽  
M.C. Caldas Giorgi ◽  
...  
Keyword(s):  
Bond Strength ◽  
Strength Test ◽  
Matrix Type ◽  
Microshear Bond Strength

scholarly journals Influence of gamma radiation on microshear bond strength and nanoleakage of nanofilled restoratives in Er, Cr:YSGG laser-prepared cavities

2018 ◽  
Vol 12 (03) ◽  
pp. 338-343
Author(s):  
Engy Fahmy Abaza ◽  
Ahmed Abbas Zaki ◽  
Haytham Samir Moharram ◽  
Amal Alaa El Din El Batouti ◽  
Asmaa Aly Yassen
Keyword(s):  
Bond Strength ◽  
Gamma Radiation ◽  
Artificial Saliva ◽  
Strength Test ◽  
The Other ◽  
Class V ◽  
Gamma Irradiated ◽  
Microshear Bond Strength ◽  
Ammoniacal Silver ◽  
Scanning Electron

ABSTRACT Objective: To evaluate the effect of gamma radiation on microshear bond strength and nanoleakage of nanofilled restoratives in laser-prepared cavities. Materials and Methods: Twenty-eight flat buccal dentin surfaces were prepared for microshear bond strength test. Er, Cr:YSGG laser was used to prepare another 28 Class V cavities on the buccal surfaces of the molars. All teeth were divided into four groups; 1st group: Application of Filtek Z350 nanocomposite material, 2nd group: As the 1st group and then exposure to gamma radiation, 3rd group: Application of Ketac N100 nanoglass ionomer, and the 4th group: As the 3rd group and then gamma irradiated. The bond strength test was performed after storage in artificial saliva for 24 h. For the nanoleakage test, teeth were submerged in a solution of ammoniacal silver nitrate, sectioned, and then examined under a scanning electron microscope. The collected data were statistically analyzed. Results: Nanocomposite showed higher bond strength values than nanoglass ionomer. Despite the fact that gamma radiation did not decrease nanocomposite bond strength, it decreased nanoglass ionomer bond strength. Nanoglass ionomer-restored cavities showed higher silver ion penetration than nanocomposite in both control and gamma-irradiated groups. Conclusion: Gamma radiation has no effect on bond strength and nanoleakage of nanocomposite so that it can be placed before radiotherapy. On the other hand, the bond strength of nanoglass ionomer was adversely affected by gamma radiation.

scholarly journals The Effect of 3% Phosphate Ascorbyl Gel on Bond Strength of Composite Resin to Enamel treated with 35% Hydrogen Peroxide

2015 ◽  
Vol 16 (5) ◽  
pp. 376-382 ◽  
Author(s):  
Monica Barros da Silva ◽  
Milena de Fátima Schalcher de Castro ◽  
Alice Carvalho Silva ◽  
Marcela Mayana Pereira Franco ◽  
Ana Paula Brito Silva ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Bond Strength ◽  
Failure Modes ◽  
Composite Resin ◽  
Testing Machine ◽  
Strength Test ◽  
Tukey Test ◽  
Universal Testing ◽  
Microshear Bond Strength ◽  
Bovine Enamel

ABSTRACT Objective To evaluate the effect of 3% phosphate ascorbyl gel (PA) in different times onto the microshear bond strength of composite resin (CR) to bovine enamel treated with 35% hydrogen peroxide (HP). Materials and methods Thirty enamel blocks of bovine incisors were made and divided into 5 groups (n = 6) with three specimens per group (n = 18), according to treatment: G1= No bleaching + CR; G2 = HP + CR after 15d; G3 = HP + CR after 24 hours; G4 = HP + PA (15 min) + CR after 24 hours; G5 = HP + PA (2 hours) + CR after 24 hours. The resin cylinders were made by Tygon matrices. Microshear bond strength test was performed using universal testing machine with a 50N load at a speed of 0.5 mm/min. Fracture modes were assessed by a stereomicroscope 40 ×. Microshear bond strength values were submitted to the analysis of variance (ANOVA) one-way and Tukey test (p < 0.05). Results G1 had significant results when compared to G3 and G5 (p < 0.01). However, G2, G3, G4 and G5 have showed no significant differences among groups (p > 0.05). Failure modes were categorized into adhesive (90%) and mixed (10%). Conclusion The use of 3% phosphate ascorbyl gel for 15 minutes was able to improve bond strength of composite resin to bleached bovine enamel, but when 3% phosphate ascorbyl gel was applied during 40 minutes it negatively interfered in the adhesion of the resin to bleached bovine enamel. How to cite this article de Castro MFS, Silva AC, Franco MMP, Silva APB, Bramante FS, da Silva MB, Lima DM, Pereira AFV. The Effect of 3% Phosphate Ascorbyl Gel on Bond Strength of Composite Resin to Enamel treated with 35% Hydrogen Peroxide. J Contemp Dent Pract 2015;16(5):376-382.

scholarly journals Adhesion to eroded dentin submitted to different surface treatments

2014 ◽  
Vol 17 (4) ◽  
pp. 40
Author(s):  
Thayanne Monteiro Ramos Oliveira ◽  
Thaysa Monteiro Ramos ◽  
Bruna Uglik Garbui ◽  
Fernando Seishim Hanashiro ◽  
Patricia Moreira De Freitas
Keyword(s):  
Bond Strength ◽  
Composite Resin ◽  
Fracture Pattern ◽  
Strength Test ◽  
Mean Values ◽  
Diamond Bur ◽  
Significant Difference ◽  
Microshear Bond Strength ◽  
One Way Anova

<p><strong>Objective: </strong>This <em>in vitro</em> study measured the microshear bond strength (µSBS) of a composite resin to sound and artificially eroded dentin, submitted to surface treatment with diamond bur (DB) or Er,Cr:YSGG laser (L). <strong>Material and Methods:</strong> Bovine dentin samples were randomly divided into six groups (n=11): G1-sound dentin, G2-eroded dentin, G3-eroded dentin treated with Er,Cr:YSGG laser at 1.5W, G4-eroded dentin treated with Er,Cr:YSGG laser at 2.0W, G5-eroded dentin treated with Er,Cr:YSGG laser at 2.5W and G6-eroded dentin treated with diamond bur. Erosive cycling was performed by immersion in 0.05M citric acid (pH2.3;10min; 6x/day) and in remineralizing solution (pH7.0, 1h, between acid attacks), for 5 days. Three composite resin cylinders were bonded to the samples and after 24h storage in distilled/deionized water (37<sup>o</sup>C), samples were submitted to microshear bond strength test and mean values (MPa) were analyzed by one-way ANOVA and Tukey tests (α=0.05). <strong>Results:</strong> G1 (19.9±7.6) presented the highest µSBS mean followed by G6 (12.2±3.8), which showed no statistically significant difference compared with the other groups, except from G4. The lowest µSBS value was found for G4 (7.1±1.5), which did not differ statistically from G2 (7.5±1.8), G3 (8.4±1.8) and G5 (8.6±3.2). Analysis of the fracture pattern revealed a higher incidence of adhesive fractures for all experimental groups. <strong>Conclusion:</strong> The results indicate that Er,Cr:YSGG laser at the parameters used in this <em>in vitro</em> study  did not enhance composite resin bonding to eroded dentin.</p>

scholarly journals Do Chemical-Based Bonding Techniques Affect the Bond Strength Stability to Cubic Zirconia?

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3920
Author(s):  
Allegra Comba ◽  
Andrea Baldi ◽  
Riccardo Michelotto Tempesta ◽  
Massimo Carossa ◽  
Letizia Perrone ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Artificial Aging ◽  
Silica Coating ◽  
Strength Test ◽  
Zirconia Sample ◽  
Luting Cement ◽  
Bonferroni Test ◽  
Bonding Systems ◽  
Composite Cylinders

This study evaluated the effectiveness of chemical-based adhesive techniques on promoting immediate and aged bond strength between zirconia and luting cement. A total of 128 discs of zirconia were divided into 4 groups (n = 32) according to the adhesive treatment: tribochemical silica-coating followed by silane (Silane Primer, Kerr) and bonding (Optibond FL, Kerr), Signum Zirconia Bond (Hereaus), Z-Prime Plus (Bisco), and All-Bond Universal (Bisco). Composite cylinders were cemented on the zirconia sample with Duo-Link Universal (Bisco). Eight specimens per group were subjected to 10,000 thermocycles and subsequently bond strength was tested with shear-bond strength test. ANOVA test showed that artificial aging significantly affected the bond strength to zirconia. Bonferroni test highlighted a significant influence of adhesive treatment (Signum) on bond strength after thermocycling. It was concluded that 10-MDP-based bonding systems showed no improvement in initial bond strength compared with tribochemical treatment. All chemical bonding techniques tested in this study were influenced by thermocycling.

scholarly journals The Influence of Blade Type and Feeding Force during Resin Bonded Dentin Specimen Preparation on the Microtensile Bond Strength Test

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 450
Author(s):  
Apinya Limvisitsakul ◽  
Suppason Thitthaweerat ◽  
Pisol Senawongse
Keyword(s):  
Bond Strength ◽  
Surface Integrity ◽  
Strength Test ◽  
Specimen Preparation ◽  
Sectional Area ◽  
Microtensile Bond Strength ◽  
Cross Sectional ◽  
Microtensile Testing ◽  
Feeding Force ◽  
Scanning Electron

This paper presents the effect of blade type and feeding force during resin-bonded dentin specimen preparation on the microtensile bond strength (μTBS) test. Forty resin-bonded flat middle dentin specimens were divided into four groups. The specimens of each group were sectioned according to type of blade and feeding force as follows: fine grit/20 N, fine grit/40 N, medium grit/20 N, and medium grit/40 N to obtain resin-dentin sticks with a cross-sectional area of 1.0 mm2. Four sticks from the center of each tooth were subjected to the μTBS test. Five remaining sticks of each group were selected for surface topography observation under a scanning electron microscope (SEM). As a result, the bond strength of the medium-grit group was higher than that of the fine-grit group (p < 0.001), whereas the feeding force had no influence on bond strength values (p = 0.648). From the SEM, sticks prepared with the fine-grit blade showed a smoother surface integrity and fewer defects on the specimen edges in comparison with the sticks prepared with the medium-grit blade. The grit type of the blade is one of the considerable factors that may affect the bond strength and the surface integrity of resin-dentin specimens for microtensile testing.

scholarly journals Influence of Different Conditioning Treatments on The Bond Integrity of Root Dentin to rGO Infiltrated Dentin Adhesive. SEM, EDX, FTIR and MicroRaman Study

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1555
Author(s):  
Firas Alqarawi ◽  
Mazen Alkahtany ◽  
Khalid Almadi ◽  
Afnan Gassem ◽  
Faris Alshahrani ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Bond Strength ◽  
Strength Test ◽  
Control Group ◽  
Micro Raman Spectroscopy ◽  
Fiber Posts ◽  
Root Canal Disinfection ◽  
Reduced Graphene ◽  
Root Dentin ◽  
Push Out

The present study aimed to synthesize and equate the mechanical properties and dentin interaction of two adhesives; experimental adhesive (EA) and 5 wt.% reduced graphene oxide rGO) containing adhesive. Scanning electron microscopy (SEM)-Energy-dispersive X-ray spectroscopy (EDX), Micro-Raman spectroscopy, push-out bond strength test, and Fourier Transform Infrared (FTIR) spectroscopy were employed to study nano-bond strength, degree of conversion (DC), and adhesive-dentin interaction. The EA was prepared, and rGO particles were added to produce two adhesive groups, EA-rGO-0% (control) and rGO-5%. The canals of sixty roots were shaped and prepared, and fiber posts were cemented. The specimens were further alienated into groups based on the root canal disinfection technique, including 2.5% sodium hypochlorite (NaOCl), Photodynamic therapy (PDT), and ER-CR-YSGG laser (ECYL). The rGO nanoparticles were flake-shaped, and EDX confirmed the presence of carbon (C). Micro-Raman spectroscopy revealed distinct peaks for graphene. Push-out bond strength test demonstrated highest values for the EA-rGO-0% group after NaOCl and PDT conditioning whereas, rGO-5% showed higher values after ECYL conditioning. EA-rGO-0% presented greater DC than rGO-5% adhesive. The rGO-5% adhesive demonstrated comparable push-out bond strength and rheological properties to the controls. The rGO-5% demonstrated acceptable DC (although lower than control group), appropriate dentin interaction, and resin tag establishment.

Effect of Different Protocols in Preconditioning With EDTA in Sclerotic Dentin and Enamel Before Universal Adhesives Applied in Self-etch Mode

2017 ◽  
Vol 42 (3) ◽  
pp. 284-296 ◽  
Author(s):  
EC Martini ◽  
SO Parreiras ◽  
MF Gutierrez ◽  
AD Loguercio ◽  
A Reis
Keyword(s):  
Bond Strength ◽  
Adhesive Systems ◽  
Microtensile Bond Strength ◽  
Universal Adhesive ◽  
Etching Pattern ◽  
Bonding Performance ◽  
Universal Adhesives ◽  
Microshear Bond Strength ◽  
Self Etch ◽  
Main Factor

SUMMARY Objectives: The aim of this study was to investigate the effect of different protocols of 17% ethylene diamine tetra-acetic acid (EDTA) conditioning on the etching pattern and immediate bond strength of universal adhesives to enamel and sclerotic dentin. Methods and Materials: Forty bovine teeth with sclerotic dentin and 20 human third molars were randomly divided into eight groups resulting from the combination of the main factors surface treatment (none, two-minute EDTA conditioning manual application, 30-second EDTA manual application, 30-second EDTA sonic application) and adhesives systems (Scotchbond Universal Adhesive [SBU] and Prime & Bond Elect [PBE]). Resin-dentin and enamel-dentin bond specimens were prepared and tested under the microtensile bond strength (μTBS) and microshear bond strength (μSBS) tests, respectively. The etching pattern produced on the unground enamel and the sclerotic dentin surfaces under the different protocols and adhesive systems was evaluated under scanning electron microscopy. Results: For enamel, only the main factor adhesive was significant (p&lt;0.0001), with SBU showing the highest μSBS. In sclerotic dentin, the lowest mean was observed for the group without EDTA application and the highest mean in the group with EDTA application with the sonic device for 30 seconds. Regardless of the EDTA protocol, the highest means of μTBS were observed for SBU (p&lt;0.05). Conclusions: EDTA conditioning improves the bonding performance of universal adhesives in the self-etch mode on sclerotic dentin, mainly when applied for 30 seconds with the aid of a sonic device. EDTA pretreatment also improves the retentive etching pattern of enamel, but it does not result in higher enamel bond strength.

scholarly journals Improvement of the Bonding Properties of Mineral Trioxide Aggregate by Elastin-Like Polypeptide Supplementation

Scanning ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Hyun-Jung Kim ◽  
Donghyun Lee ◽  
Seungryong Cho ◽  
Ji-Hyun Jang ◽  
Sahng Gyoon Kim ◽  
...  
Keyword(s):  
Contact Angle ◽  
Bond Strength ◽  
Flow Rate ◽  
Mineral Trioxide Aggregate ◽  
Strength Test ◽  
Research Data ◽  
Intimate Contact ◽  
Tooth Structure ◽  
Bonding Properties ◽  
Push Out

Introduction. Elastin-like polypeptide (ELP) supplementation was previously reported to enhance the physical properties of mineral trioxide aggregate (MTA). The aim of this study was to investigate the effect of ELP supplementation on the bonding properties of MTA to dentin. Methods. Two types of ELPs were synthesized and mixed with MTA in a 0.3 liquid/powder ratio. The push-out bond strength test and interfacial observation with scanning electron microscopy were performed for ELP-supplemented MTA. The porosity of MTA fillings in the cavity was observed with microcomputed tomography. The stickiness, flow rate, and contact angle were additionally measured for potential increased bonding properties. Results. ELP supplementation improved the bond strength of MTA to dentin. MTA supplemented by a specific ELP exhibited a less porous structure, higher stickiness, and higher flow rate. ELPs also decreased the contact angle to dentin. Conclusions. This research data verifies that ELP improves the bonding properties of MTA to a tooth structure. The sticky and highly flowable characteristics of ELP-supplemented MTA may provide intimate contact with dentin and supply a less porous cement structure, which might improve the bonding properties of MTA.

scholarly journals Effect of topical fluoride on microshear bond strength of primary enamel to composite, microhardness of enamel and its surface morphology: An in vitro study

2019 ◽  
Vol 13 (4) ◽  
pp. 305-310
Author(s):  
Mina Biria ◽  
Sajedeh Namaei Ghasemi ◽  
Seyedeh Mahsa Sheikh-Al-Eslamian ◽  
Narges Panahandeh
Keyword(s):  
Bond Strength ◽  
Artificial Saliva ◽  
Morphological Characteristics ◽  
In Vitro Study ◽  
Vitro Study ◽  
Control Group ◽  
Modes Of Failure ◽  
Group 3 ◽  
Microshear Bond Strength

Background. This in vitro study aimed to evaluate the microshear bond strength (μSBS), microhardness and morphological characteristics of primary enamel after treating with sodium fluoride (NaF) and acidulated phosphate fluoride (APF). Methods. Forty-eight primary canines were cut into mesial and distal sections and assigned to five groups randomly: group 1 (immersed in saliva as a control), group 2 (treated with NAF and immersed in saliva for 30 minutes), group 3 (treated with APF and immersed in saliva for 30 minutes), group 4 (treated with NAF and immersed in saliva for 10 days), and group 5 (treated with APF and immersed in saliva for 10 days). Composite resin (Filtek Z250) was bonded on the specimens (n=15) for measuring the μSBS. After storage in 37°C artificial saliva for 24 hours, µSBS and Vickers hardness tests (10 readings) were performed. The data were analyzed using one-way ANOVA and Kolmogorov-Smirnov, Levene’s and Tukey HSD tests (P<0.05). Morphological analysis of enamel and modes of failure were carried out under a scanning electron microscope (SEM) on two remaining specimens. Results. Significant differences in μSBS were only noted between groups 2 and 4 (P=0.024). Group 3 showed a significant decrease in hardness after storage in artificial saliva (P<0.001), with a significantly lower hardness than the other groups (P<0.001). The SEM observations showed irregular particles in groups 3 and 5; uniform, smooth and thin coats were seen in groups 2 and 4. Conclusion. Fluoride therapy with NaF and APF gels prior to restorative treatments had no adverse effects on the microshear bond strength.

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