|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|5432990||1398051||2017||12 صفحه PDF||سفارش دهید||دانلود کنید|
- Copper nanoparticles were characterized and added in different concentrations to etch-and-rinse adhesive.
- Addition of copper nanoparticles did not affect several mechanical properties tested.
- Higher concentrations of copper nanoparticles produce more resistance adhesive-dentin interfaces.
- Copper nanoparticles significant increase the antimicrobial activity.
ObjectivesTo evaluate the effect of addition of copper nanoparticles (CN) at different concentrations into a two-step etch-and-rinse (2-ER) adhesive on antimicrobial activity (AMA), copper release (CR), ultimate tensile strength (UTS), degree of conversion (DC), water sorption (WS), solubility (SO), as well as the immediate (IM) and 1-year resin-dentin bond strength (Î¼TBS) and nanoleakage (NL).MethodsSeven adhesives were formulated according to the addition of CN (0, 0.0075, 0.015, 0.06, 0.1, 0.5 and 1Â wt%) in adhesive. The AMA was evaluated against Streptococcus mutans using agar diffusion assay. For CR, WS and SO, specimens were constructed and tested for 28 days. For UTS, specimens were tested after 24Â h and 28 days. For DC, specimens were constructed and tested after 24Â h by FTIR. After enamel removal, the ER was applied to dentin. After composite resin build-ups, specimens were sectioned to obtain resin-dentin sticks. For Î¼TBS and NL, specimens were tested after 24Â h and 1-year periods. All data were submitted to statistical analysis (Î±Â =Â 0.05).ResultsThe addition of CN provided AMA to the adhesives at all concentrations. Higher CR was observed in adhesives with higher concentration of CN. UTS, DC, WS and SO were not influenced. For Î¼TBS an increase was observed in 0.1 and 0.5% copper group. For NL, a significant decrease was observed in all groups in comparison with control group. After 1-year, no significant reductions of Î¼TBS and no significant increases of NL were observed for copper containing adhesives compared to the control group.SignificanceThe addition of CN in concentrations up to 1Â wt% in the 2-ER adhesive may be an alternative to provide AMA and preserve the bonding to dentin, without reducing adhesives' mechanical properties evaluated.
Journal: Dental Materials - Volume 33, Issue 3, March 2017, Pages 309-320