Effect of silver nanoparticles on the physicochemical and antimicrobial properties of an orthodontic adhesive

Degrazia, Felipe Weidenbach; Leitune, Vicente Castelo Branco; García, Isadora Martini; Arthur, Rodrigo Alex; Samuel, Susana Maria Werner; Collares, Fabrício Mezzomo

doi:10.1590/1678-775720160154

Cited by 78 publications

(91 citation statements)

References 29 publications

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“…Next, the colonies were visually counted, scaled by dilution factors and then transformed into colony forming units (CFUs) per milliliter. The experiment was performed according to a previous study (17).…”

Section: Direct Contact Inhibition (Dci)mentioning

confidence: 99%

Triazine Compound as Copolymerized Antibacterial Agent in Adhesive Resins

et al. 2017

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The aim of this study was to formulate and evaluate an experimental adhesive resin with the addition of 1,3,5-triacryloylhexahydro-1,3,5-triazine at different concentrations. Experimental adhesive resins were obtained by mixing 50% wt bisphenol A glycol dimethacrylate (BisGMA), 25% wt triethylene glycol dimethacrylate (TEGDMA), 25% wt 2-hydroxyethyl methacrylate (HEMA) and photoinitiator system. The triazine compound was added in 1, 2.5 and 5% wt to a base adhesive resin and one group remained with no triazine as control group. The experimental adhesive resins were analyzed for antibacterial activity (n=3), degree of conversion (n=3) and softening in solvent (n=3). Data distribution was evaluated by Kolmogorov-Smirnov test, paired t test, one-way ANOVA and Tukey's with a 0.05 level of significance. All groups with added triazine compound showed antibacterial activity against Streptococcus mutans (p<0.05). All groups achieved more than 70% degree of conversion, but there was no difference in this chemical property (p>0.05). The initial Knoop hardness was higher in 2.5 and 5% wt groups (p<0.05) and both groups present lower percentage variation of Knoop hardness after solvent degradation. The present study formulated an antibacterial adhesive resin with a non-releasing agent able to copolymerize with the comonomeric blend, improving the restorative material's properties.

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Section: Direct Contact Inhibition (Dci)mentioning

confidence: 99%

Triazine Compound as Copolymerized Antibacterial Agent in Adhesive Resins

et al. 2017

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“…The incredible antibacterial impact of these nanostructured specialists is fundamentally ascribed to the increased surface area to volume ratio empowering more noteworthy latency of atoms on the surface, which provides maximum contact with the environment [14,15]. Likewise, the minimal size of nanoparticles enables penetration through cell membranes simpler, hence influencing intracellular processes bringing about enhanced reactivity and antimicrobial property [16].…”

Section: Discussionmentioning

confidence: 99%

“…It has been reported that Ag nanoparticles have antibacterial property against Streptococcus mutans and inhibits its growth [16]. Previous authors noted that orthodontic composite adhesives comprising of nanosilver fillers particles prevents enamel demineralization around bracket surfaces without arbitrating their physical properties [17].…”

Section: Discussionmentioning

confidence: 99%

Comparative Evaluation of Antimicrobial Efficacy of Silver, Titanium Dioxide and Zinc Oxide Nanoparticles against Streptococcus mutans

Reddy¹,

Kambalyal²,

Shanmugasundaram³

et al. 2018

Pesqui. bras. odontopediatria clín. integr.

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Objective: To determine the antimicrobial efficacy of silver, titanium dioxide and zinc oxide nanoparticles against Streptococcus mutans. Material and Methods: Serial dilution method was employed for preparing 1%, 0.5%, 0.25% concentrations of the three test compounds. ATCC 25175 strain of streptococcus mutans was used to assess the antimicrobial activity of test compounds. Equal quantity of BHI broth was dispensed in test tubes containing sectioned tooth and to this the prepared bacterial inoculum was added. Prepared concentrations of test compounds were added accordingly and incubated for 24hrs at 37 0 C. Then, the sectioned tooth was removed and the adherent bacteria were transferred into saline solution by vortexing. These suspensions were transferred onto sterile blood agar plate to make lawn culture and were further incubated at 37 0 C for 24hrs to determine viable bacterial count. The number of colonies were counted manually from each plate and recorded for further analysis. Decrease in number of colonies represents the effective concentration of the test compound against the inhibition of biofilm formation. Results: A significant difference in the colony forming units among all three concentrations of silver (Ag), titanium dioxide (TiO2) and zinc (ZnO) nanoparticles was noted and the antimicrobial effect of nanoparticles was concentration dependent. Inter group comparison of colony forming units with 1%, 0.5% and 0.25% of the test compound revealed that the colony forming units on the ZnO nanoparticles demonstrated highest value followed by TiO2 and the least were with that of the Ag nano particles. Conclusion: Silver, Zinc oxide and Titanium dioxide showed significant antimicrobial effects and the antimicrobial effect of nanoparticles was concentration dependent.

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“…9,11,12,13,14 The increased conversion is due to the chemical affinity between the methacrylate groups of the adhesive and the polymeric capsule. The in situ analysis corresponds to the most challenging conditions that exist inside the hybrid layer 12,15,16 and can predict the adhesive performance in vivo 17 due to a positive correlation with the µTBS. 15 Therefore, the results of the in situ DC in the present study suggest that it is possible to predict the low hydrolytic degradation and reliable µTBS.…”

Section: Discussionmentioning

confidence: 99%

Effect on adhesion of a nanocapsules-loaded adhesive system

et al. 2018

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This study aimed to evaluate the in situ degree of conversion, contact angle, and immediate and long-term bond strengths of a commercial primer and an experimental adhesive containing indomethacin-and triclosan-loaded nanocapsules (NCs). The indomethacin-and triclosan-loaded NCs, which promote anti-inflammatory and antibacterial effects through controlled release, were incorporated into the primer at a concentration of 2% and in the adhesive at concentrations of 1, 2, 5, and 10%. The in situ degree of conversion (DC, n=3) was evaluated by micro-Raman spectroscopy. The contact angle of the primer and adhesive on the dentin surface (n = 3) was determined by an optical tensiometer. For the microtensile bond strength µTBS test (12 teeth per group), stick-shaped specimens were tested under tensile stress immediately after preparation and after storage in water for 1 year. The data were analyzed using two-way ANOVA, three-way ANOVA and Tukey's post hoc tests with α=0.05. The use of the NC-loaded adhesive resulted in a higher in situ degree of conversion. The DC values varied from 75.07 ± 8.83% to 96.18 ± 0.87%. The use of NCs in only the adhesive up to a concentration of 5% had no influence on the bond strength. The contact angle of the primer remained the same with and without NCs. The use of both the primer and adhesive with NCs (for all concentrations) resulted in a higher contact angle of the adhesive. The longitudinal μTBS was inversely proportional to the concentration of NCs in the adhesive system, exhibiting decreasing values for the groups with primer containing NCs and adhesives with increasing concentrations of NCs. Adhesives containing up to 5% of nanocapsules and primer with no NCs maintained the in situ degree of conversion, contact angle, and immediate and long-term bond strengths. Therefore, the NC-loaded adhesive can be an alternative method for combining the bond performance and therapeutic effects. The use of an adhesive with up to 5% nanocapsules containing indomethacin and triclosan and a primer with no nanocapsules maintained the long-term bond performance.

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Effect of silver nanoparticles on the physicochemical and antimicrobial properties of an orthodontic adhesive

Cited by 78 publications

References 29 publications

Triazine Compound as Copolymerized Antibacterial Agent in Adhesive Resins

Triazine Compound as Copolymerized Antibacterial Agent in Adhesive Resins

Comparative Evaluation of Antimicrobial Efficacy of Silver, Titanium Dioxide and Zinc Oxide Nanoparticles against Streptococcus mutans

Effect on adhesion of a nanocapsules-loaded adhesive system

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