Water sorption and solubility of dentin bonding agents light-cured with different light sources

Fabre, Hebert Samuel Carafa; Fabre, Samuel; Cefaly, Daniela Francisca Gigo; Carrilho, Marcela Rocha de Oliveira; Garcia, Fernanda Cristina Pimentel; Wang, Linda

doi:10.1016/j.jdent.2006.09.002

Cited by 60 publications

(64 citation statements)

References 24 publications

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“…As a result, manufacturers claim that polymerization could be completed with higher intensity lights, which result in higher degree of monomer conversion, and is associated with improvements in the mechanical properties and of resin-based materials 13,20 . In this regard, modified light polymerization protocols can lead to the resulting polymer having different structures and properties, such as hardness, diametral tensile strength (DTS), and water solubility and sorption 1,11,20 .…”

Section: Introductionmentioning

confidence: 99%

Effect of different light curing methods on mechanical and physical properties of resin-cements polymerized through ceramic discs

Cekic‐Nagas

Ergün

2011

J. Appl. Oral Sci.

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ObjectiveThe aim of this study was to compare the polimerization ability of three different light-curing units (quartz tungsten halogen, light-emitting diodes and plasma arc) and their exposure modes (high-intensity and soft-start) by determination of microhardness, water sorption and solubility, and diametral tensile strength of 5 dual-curing resin cements. Material and methodsA total of 720 disc-shaped samples (1 mm height and 5 mm diameter) were prepared from different dual-curing resin cements (Duolink, Nexus, Bifix-QM, Panavia F and RelyX Unicem). Photoactivation was performed by using quartz tungsten halogen (high-power and soft-up modes), light-emitting diode (standard and exponential modes) and plasma arc (normal and ramp-curing modes) curing units through ceramic discs. Then the samples (n=8/per group) were stored dry in the dark at 37ºC for 24 h. The Vickers hardness test was performed on the resin cement layer with a microhardness tester (Shimadzu HMV). For sorption and solubility tests; the samples were stored in a desiccator at 37ºC and weighed to a constant mass. The samples were weighed both before and after being immersed in deionized water for different periods of time (24 h and 7 days) and being desiccated. The diametral tensile strength of the samples was tested in a universal testing machine at a crosshead speed of 0.5 mm/min. Data were analyzed statistically by nonparametric Kruskal Wallis and Mann-Whitney U tests at 5% significance level. ResultsResin cement and light-curing unit had significant effects (p<0.05) on microhardness, diametral tensile strength, water solubility and sorption. However, no significant differences (p>0.05) were obtained with different modes of LCUs. ConclusionThe study indicates that polymerization of resin cements with different light-curing units may result in various polymer structures, and consequently different mechanical and physical properties.

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Section: Introductionmentioning

confidence: 99%

Effect of different light curing methods on mechanical and physical properties of resin-cements polymerized through ceramic discs

Cekic‐Nagas

Ergün

2011

J. Appl. Oral Sci.

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“…[21][22][23][24] However, all these studies observed the water sorption and solubility characteristics for only short periods of time and usually with only one water sorption and desorption cycle, which may not provide the true picture of water sorption and solubility of the dental adhesives. Intraoral temperature is not constant but varies rapidly following routine eating and drinking.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on water sorption and solubility of dental adhesive resins

Dhanpal

Yiu

King

et al. 2009

Journal of Dentistry

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“…Solvents also contribute to an exacerbation of the hydrophilicity of the adhesives 12 . Additionally, another study 7 demonstrated differences in the water sorption of commercial formulations of bonding agents, which indicated the presence of residual solvents as a condition to exacerbate water sorption. This exerts a negative influence on the bonding longevity, as varied resinous monomers are combined into solvents as neat acetone, ethanol, water, or their combination 17,19 .…”

Section: Discussionmentioning

confidence: 99%

“…For a durable, long-term sealing of dentin, monomers must be converted to stable high-molecular-weight polymers 20 . The residual water or organic solvents is claimed to be responsible for producing localized areas of incomplete monomer polymerization 6,7,9 . Thus, the monomer conversion and the extent of polymerization might vary throughout the hybrid layer, which could cause significant differences in the quality of the interpenetrating network at different locations 13 .…”

Section: Introductionmentioning

confidence: 99%

Effects of solvent evaporation on water sorption/solubility and nanoleakage of adhesive systems

et al. 2014

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ObjectiveTo evaluate the influence of solvent evaporation in the kinetics of water diffusion (water sorption-WS, solubility-SL, and net water uptake) and nanoleakage of adhesive systems. Material and MethodsDisk-shaped specimens (5.0 mm in diameter x 0.8 mm in thickness) were produced (N=48) using the adhesives: Clearfil S3 Bond (CS3)/Kuraray, Clearfil SE Bond - control group (CSE)/Kuraray, Optibond Solo Plus (OS)/Kerr and Scotchbond Universal Adhesive (SBU)/3M ESPE. The solvents were either evaporated for 30 s or not evaporated (N=24/per group), and then photoactivated for 80 s (550 mW/cm2). After desiccation, the specimens were weighed and stored in distilled water (N=12) or mineral oil (N=12) to evaluate the water diffusion over a 7-day period. Net water uptake (%) was also calculated as the sum of WS and SL. Data were submitted to 3-way ANOVA/Tukey's test (α=5%). The nanoleakage expression in three additional specimens per group was also evaluated after ammoniacal silver impregnation after 7 days of water storage under SEM. ResultsStatistical analysis revealed that only the factor "adhesive" was significant (p<0.05). Solvent evaporation had no influence in the WS and SL of the adhesives. CSE (control) presented significantly lower net uptake (5.4%). The nanoleakage was enhanced by the presence of solvent in the adhesives. ConclusionsAlthough the evaporation has no effect in the kinetics of water diffusion, the nanoleakage expression of the adhesives tested increases when the solvents are not evaporated.

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Water sorption and solubility of dentin bonding agents light-cured with different light sources

Cited by 60 publications

References 24 publications

Effect of different light curing methods on mechanical and physical properties of resin-cements polymerized through ceramic discs

Effect of different light curing methods on mechanical and physical properties of resin-cements polymerized through ceramic discs

Effect of temperature on water sorption and solubility of dental adhesive resins

Effects of solvent evaporation on water sorption/solubility and nanoleakage of adhesive systems

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