Effects of solvent evaporation on water sorption/solubility and nanoleakage of adhesive systems
J. appl. oral sci
;
22(4): 294-301, Jul-Aug/2014. tab, graf
Article
in English
| LILACS, BBO
| ID: lil-718289
ABSTRACT
Objective:
To 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 andMethods:
Disk-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.Results:
Statistical 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.Conclusions:
Although 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. .
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Solvents
/
Water
/
Dentin-Bonding Agents
/
Resin Cements
/
Dental Leakage
Type of study:
Evaluation studies
Language:
English
Journal:
J. appl. oral sci
Journal subject:
Dentistry
Year:
2014
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
University of Brasilia/BR
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