Effect of Nanofiller Addition to an Experimental Dentin Adhesive on Microtensile Bond Strength to Human Dentin (original) (raw)
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Journal of Dentistry of Tehran University of Medical Sciences, 2009
The purpose of the study was to evaluate the influence of adding nanofiller particles to a dentin-bonding agent on bond strength. Materials and Methods: Fifty-four human intact premolar teeth were divided in to 6 groups of nine. The teeth were ground on occlusal surfaces and were polished with a 320 and 600 grit silicon carbide papers, respectively. An experimental bonding system based on Acetone/Alcohol solvent was provided with filler contents of 0, 0.5, 1, 2.5, 5, and 10 weight percent fumed silica nanofiller. After dentin surface etching, rinsing, and blot drying, the experimental bonding agents were applied to dentin surface. A composite resin was bonded to the dentin on the bonding agent. The specimens were thermocycled for 500 cycles and sectioned in stick form specimens. After two week of storage in distilled water, microtensile bond strength of the specimens was measured. Data were analyzed by one way ANOVA and Dunnett t3 tests. Results: Bond strength to dentin was significantly affected by the filler level. Minimum and maximum microtensile bond strength was in the experimental bonding agent with no filler 5.88 MPa (SD=1.62) and with filler level of 1% wt. 15.15 MPa (SD=4.4) respectively and decreased with the increase of filler content down to 8.95 MPa (SD=3.28) for the filler level of 10 wt. %. Conclusion: Filler content may be one of the important factors influencing the bond strength of dental adhesives. Adding silanized silica nanofillers to dentin adhesive agent increases microtensile bond strength but it is important to determine the optimum filler level to optimize the dentin bond strength.
European Journal of Dentistry, 2012
ABSTRACTObjective: To evaluate the effect of nanofillers incorporated into adhesives on the microtensile bond strength (μ-TBS) and interfacial micromorphology to dentin.Methods: The occlusal enamel of 5 human molars was removed and each tooth sectioned into four quarters. The exposed dentin was treated with one of the following adhesives: Adper Single Bond (SB-unfilled), OptiBond Solo Plus (OS-barium aluminoborosilicate, 400nm Ø), Prime & Bond NT (NT-colloidal silica, 7-40 nm Ø) and Adper Single Bond 2 (SB2-colloidal silica, 5nm Ø). Cylinders of resin-based composite were constructed on the adhesive layers. After 24-hour storage, the restored tooth-quadrants were sectioned to obtain stick-shaped specimens (0.8 mm2, cross-sectional area) and submitted to μ-TBS at a cross-speed of 0.5 mm/min. Data were analyzed using one-way ANOVA and Tukey’s test (alpha = .05). Twenty-eight additional teeth were used for interfacial micromorphologic analysis by SEM (16-teeth) and TEM (12-teeth). The ...
Egyptian dental journal, 2021
Objective: The aim of this in vitro study was to investigate the effect of nanopropolis and nanochitozan on the microtensile bond strength (μTBS) of universal adhesive to dentin. Materials and methods: Fifteen extracted sound human permanent molars were selected. Occlusal one-third of the tooth crowns was removed to expose the mid-coronal dentin. The teeth were randomly divided into three equal groups according to the pretreatment before application of the adhesive i.e. Group A: 1% nanochitozan was applied, group B: 1% nanopropolis was applied and group C: received no treatment (control). Universal adhesive Prime & BondTM was applied in the self- etch mode according to manufacturer's instructions. Composite build-ups were done using a specially fabricated split Teflon mold. After being kept in an incubator at 37°C for 24 hours, Teeth were sectioned to obtain beams with cross-sectional areas of about 1 mm × 1 mm. μTBS test was done using universal testing machine. One-way ANOVA f...
Polymers, 2021
The objective of this study was to synthesize and assess unfilled and filled (silica nanoparticles) dentin adhesive polymer. Methods encompassing scanning electron microscopy (SEM)—namely, energy dispersive X-ray spectroscopy (EDX), micro-tensile bond strength (µTBS) test, Fourier transform infrared (FTIR), and micro-Raman spectroscopy—were utilized to investigate Si particles’ shape and incorporation, dentin bond toughness, degree of conversion (DC), and adhesive–dentin interaction. The Si particles were incorporated in the experimental adhesive (EA) at 0, 5, 10, and 15 wt. % to yield Si-EA-0% (negative control group), Si-EA-5%, Si-EA-10%, and Si-EA-15% groups, respectively. Teeth were set to form bonded samples using adhesives in four groups for µTBS testing, with and without aging. Si particles were spherical shaped and resin tags having standard penetrations were detected on SEM micrographs. The EDX analysis confirmed the occurrence of Si in the adhesive groups (maximum in the S...
Effect of adhesive layers on microshear bond strength of nanocomposite resin to dentin
Journal of clinical and experimental dentistry, 2017
Bond strength of adhesive layer can absorb unwanted stresses of polymerization shrinkage in composite resin restorations; increased microshear bond strength can prevent failure of restoration materials, the purpose of this study was to evaluate the effect of adhesive layers on microshear bond strength of nanocomposite resin to dentin. Two different types of adhesive systems: universal adhesive (ExciTE) and newly developed adhesive (Nano-Bond), and one type of light-cured resin restorative material (Nanocomposite resin) were used in this study. The occlusal surfaces of extracted human molar teeth were ground perpendicular to the long axis of each tooth to expose a flat dentin surface. The adhesives were applied on dentin surfaces (single application or double application). Nanocomposite resin was then placed and light cured for 40 seconds. After 24 hours of immersion in water at 37°C, then subjected to thermocycling before testing, a microshear bond test was carried out. The data wer...
Applied Adhesion Science, 2016
This study investigated the effect of adding different concentrations of phosphate-grafted-silica nanoparticles (SiO2–POOH) on dentin bond strength of experimental one-step self-etching adhesives (1-SEAs). Phosphate functional group was grafted onto silica nanoparticles through the free radical polymerization of an acid phosphate monomer [methacryloyloxyethyl dihydrogen phosphate/bis (methacryloyloxyethyl) hydrogen phosphate—HEMA-P] in an alcoholic medium. The resulting SiO2–POOH was characterized by FTIR spectroscopy. 1-SEA with two different acidic phosphate monomer concentrations (HEMA-P at 0 and 40% wt) were prepared and SiO2–POOH was added in 0 (control), 0.1, 0.2, 0.5, 1, 2, 4, 6 and 8wt%. The formulated 1-SEAs were evaluated for shear bond strength to dentin. Statistical comparisons were conducted at 5% significance level. The grafting reaction of SiO2–POOH was confirmed by FTIR. Compared with the unfilled 1-SEA, the addition of 0.1wt% of SiO2–POOH nanoparticles resulted in a...
Revista Portuguesa de Estomatologia, Medicina Dentária e Cirurgia Maxilofacial, 2016
The aim of this study was to evaluate the microtensile bond strength and the adhesive interface of four adhesive systems to primary dentin. Methods: Sixteen sound human primary molars were ground flat to expose dentin and randomly divided into four experimental groups according to the different adhesive material evaluated: three self-etching systems (Clearfil TM Protect Bond, Clearfil TM S 3 Bond Plus and Futurabond ® U) and one etch-and-rinse system (Prime&Bond ® NT). The adhesives were applied under manufacturer's instructions and the crowns "restored" with a composite resin (Synergy ® D6). The "restored" teeth were then cross-sectioned to obtain sticks. Each stick was evaluated using a microtensile test in a universal testing machine. Additionally, eighteen dentin samples from four temporary molars were prepared for dentin conditioning and interface morphology evaluation using scanning electron microscopy. The bond strength results were analyzed using one-way ANOVA and a Tukey HSD test (confidence level of 95%). Results: ClearfilTMS 3 Bond Plus (47,28 MPa), Prime&Bond ® NT (43.11 MPa) and Clearfil TM Protect Bond (40.33 MPa), presented the highest adhesion values without statistical differences. Futurabond ® U bond strengths (35.16 MPa) was statistically similar to Clearfil TM Protect Bond (p = 0.271) but significantly lower from Prime&Bond ® NT (p = 0.022) and Clearfil TM S 3 Bond Plus (p < 0.001). An ultra-morphological evaluation showed marked differences in smear layer dissolution, depth of dentin demineralization and thickness of the hybrid layer promoted by the different adhesive strategies evaluated. Conclusions: Considering the limitations of this in vitro study, some self-etch adhesives may be capable of producing high bond strengths to primary dentin, similar to the etch-and-rinse adhesive evaluated.
Microtensile bond strengths of seven dentin adhesive systems
Dental Materials, 2000
Objectives. The purpose of this study was to evaluate the microtensile bond strengths of seven dentin adhesive systems (Solid Bond, EBS-Multi, PermaQuik, One Coat Bond, Gluma One Bond, Prime & Bond NT/NRC and Clearfil Liner Bond 2V) and their respective fracture modes.
Microtensile versus microshear bond strength between dental adhesives and the dentin substrate
International Journal of Adhesion and Adhesives, 2013
This study evaluated the performance of different bonding tests on the bond strength of three adhesive systems to dentin. Forty-eight bovine incisors were used in the study, which were allocated in two groups according to the bond strength test performed: microtensile (mTBS) or microshear (mSBS). Also, each group was divided in three subgroups according to the adhesive system applied: Single Bond (SB), Prime & Bond (PB) and XP Bond (XPB) (n¼ 8). The teeth were prepared according to each bond strength test protocol, and then the specimens were tested in an universal testing machine (EMIC). The data were submitted to two-way ANOVA (bond strength test and adhesive system type factors) and Tukey's post hoc test (α¼0.05). The mTBS results were higher for all the adhesives when compared to the mSBS ones. Within the mTBS results, SB showed higher bond strength than PB and XPB, which showed similar adhesive performance among each other; within the mSBS results, all the adhesives presented similar bond strength values to dentin. The mTBS test detected differences between the adhesive systems evaluated; in contrast, the mSBS test was less discriminating in evaluating the adhesive performance of the materials tested.
Operative Dentistry, 2010
Objectives: This study evaluated mechanically and ultra-morphologically 11 different adhesive systems bonded to dentin. Methods: The microtensile bond strength (µTBS) of 11 contemporary adhesives, including two three-step etch&rinse, three two-step etch&rinse, two twostep self-etch and four one-step self-etch adhesives to dentin, were measured. The resultant interfacial ultra-structure at dentin was characterized by transmission electron microscopy (TEM). Human third molars had their superficial dentin surface exposed, after which a standardized smear layer was produced using a mediumgrit diamond bur. The selected adhesives were applied according to their respective manufac