Addition of Silver Nanoparticles to Composite Resin: Effect on Physical and Bactericidal Properties In Vitro

Neves, Patrícia Bolzan Agnelli das; Agnelli, José Augusto Marcondes; Kurachi, Cristina; Souza, Clóvis Wesley Oliveira de

doi:10.1590/0103-6440201302398

Cited by 47 publications

(42 citation statements)

References 19 publications

(33 reference statements)

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“…Surface roughness is one of the properties of tooth and restorative materials that influence the formation and accumulation of biofilm. On the rough and irregular surfaces the dental biofilm is formed in greater amounts and has quicker maturation when to flat surfaces (24). Past studies indicated that even a demineralized enamel surface, which presents a higher surface roughness than sound enamel, is able to retain a larger amount of biofilm when compared to the intact enamel (20,25).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Surface Roughness and Bacterial Adhesion on Tooth Enamel Irradiated With High Intensity Lasers

et al. 2017

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The aim was to evaluate the surface roughness and bacterial adhesion on enamel irradiated with high intensity lasers, associated or not to a fluoride varnish. Eighty fragments of bovine enamel were equally divided in 8 groups (n=10). Group 1 was not treated and Group 2 received only a 5% fluoride varnish application. The other groups were irradiated with an Er:Cr:YSGG (8.92 J/cm 2 ), an Nd:YAG (84.9 J/cm 2 ) and a diode laser (199.04 J/cm 2 ), associated or not to a 5% fluoride varnish. The surface roughness was measured before and after treatments. Afterward, all samples were incubated in a suspension of S. mutans at 37 °C for 24 h. The colony-forming units (CFU) were counted by a stereoscope and the results were expressed in CFU/mm 2 . One-way ANOVA and the Tukey´s test compared the roughness data and the Student´s test compared the results obtained in the bacterial adhesion test (α=5%). The results showed that the irradiated samples without varnish presented the same roughness and the same bacterial adhesion that the non-irradiated samples. However, samples irradiated in the presence of fluoride varnish showed higher surface roughness and higher bacterial adhesion than the non-irradiated samples and those irradiated without varnish. Presence of pigments in the varnish increased the lasers' action on the enamel surface, which produced ablation in this hard tissue and significantly increased its surface roughness. For this reason, the enamel's susceptibility to bacterial adhesion was higher when the irradiation of the samples was made in presence of fluoride varnish.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Surface Roughness and Bacterial Adhesion on Tooth Enamel Irradiated With High Intensity Lasers

et al. 2017

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“…The importance of minimal surface roughness for the success of restorations has been well documented. [3][4][5]8,9 Despite the evolution of dental composites, surface defects on these materials persist.…”

Section: Discussionmentioning

confidence: 99%

“…2 However, the presence of irregularities on restoration surfaces can influence esthetics, allows for biofilm retention and discoloration, and contributes to secondary caries. 3 A high surface roughness can compromise the physical properties of composites and contributes to the wear of restorations. [4][5][6] In this context, the use of finishing and polishing techniques for composite resins is necessary.…”

Section: Introductionmentioning

confidence: 99%

Impact of a novel polishing method on the surface roughness and micromorphology of nanofilled and microhybrid composite resins

Ferreira

Souto

Borges

et al. 2015

Revista Portuguesa de Estomatologia, Medicina Dentária e Cirurg

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r e v p o r t e s t o m a t o l m e d d e n t c i r m a x i l o f a c . 2 0 1 5;5 6(1):18-24 a b s t r a c t Objective: This study aimed to evaluate the effects of different finishing and polishing techniques, including a novel polishing method (silicon carbide brush), on the surface roughness and morphology of nanofilled (Filtek Z350XT) and microhybrid (Filtek Z250) composite resins.Methods: Thirty-five specimens of each resin were fabricated and assigned randomly to receive the following finishing/polishing treatments (n = 5 per group): none (control), Sof-Lex Pop-On discs (POP), Praxis discs (PRA), POP + felt discs with diamond paste, POP + silicon carbide brush, PRA + felt discs with diamond paste, and PRA + silicon carbide brush. Average roughness (Ra) in m was evaluated using a 3D profilometer. Scanning electron microscopic images were also obtained and descriptively analyzed. Two-way analysis of variance and Tukey's test (p < 0.05) were used to evaluate the effects of resin type, finishing/polishing system, and interactions between these two variables on Ra values.Results: For the microhybrid resin, greater surface smoothness was obtained using POP or PRA + silicon carbide brush. For the nanofilled resin, the smoothest surface was obtained with POP + felt discs with diamond paste or silicon carbide brush. Conclusion: The surface roughness of a composite resin depends on its composition and finishing and polishing technique used. article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).r e v p o r t e s t o m a t o l m e d d e n t c i r m a x i l o f a c . 2 0 1 5;5 6(1):18-24

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“…It is well known that rough surfaces increase bone-to-implant contact. 32 However, rough surfaces are also more likely to facilitate biofilm formation in the oral cavity; 33 therefore, a significant increase in surface roughness is not desirable, especially for the trans-gingival parts of an implant. The aspect of surface wettability is regarded as the second most relevant factor in the dynamics of cell adhesion to the surface.…”

mentioning

confidence: 99%

In vitro studies of nanosilver-doped titanium implants for oral and maxillofacial surgery

Pokrowiecki¹,

Zaręba²,

Szaraniec³

et al. 2017

IJN

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The addition of an antibacterial agent to dental implants may provide the opportunity to decrease the percentage of implant failures due to peri-implantitis. For this purpose, in this study, the potential efficacy of nanosilver-doped titanium biomaterials was determined. Titanium disks were incorporated with silver nanoparticles over different time periods by Tollens reaction, which is considered to be an eco-friendly, cheap, and easy-to-perform method. The surface roughness, wettability, and silver release profile of each disc were measured. In addition, the antibacterial activity was also evaluated by using disk diffusion tests for bacteria frequently isolated from the peri-implant biofilm: Streptococcus mutans, Streptococcus mitis, Streptococcus oralis, Streptococcus sanguis, Porphyromonas gingivalis, Staphylococcus aureus , and Escherichia coli . Cytotoxicity was evaluated in vitro in a natural human osteoblasts cell culture. The addition of nanosilver significantly increased the surface roughness and decreased the wettability in a dose-dependent manner. These surfaces were significantly toxic to all the tested bacteria following a 48-hour exposure, regardless of silver doping duration. A concentration of 0.05 ppm was sufficient to inhibit Gram-positive and Gram-negative species, with the latter being significantly more susceptible to silver ions. However, after the exposure of human osteoblasts to 0.1 ppm of silver ions, a significant decrease in cell viability was observed by using ToxiLight™ BioAssay Kit after 72 hours. Data from the present study indicated that the incorporation of nanosilver may influence the surface properties that are important in the implant healing process. The presence of nanosilver on the titanium provides an antibacterial activity related to the bacteria involved in peri-implantitis. Finally, the potential toxicological considerations of nanosilver should further be investigated, as both the antibacterial and cytotoxic properties may be observed at similar concentration ranges.

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Addition of Silver Nanoparticles to Composite Resin: Effect on Physical and Bactericidal Properties In Vitro

Cited by 47 publications

References 19 publications

Evaluation of Surface Roughness and Bacterial Adhesion on Tooth Enamel Irradiated With High Intensity Lasers

Evaluation of Surface Roughness and Bacterial Adhesion on Tooth Enamel Irradiated With High Intensity Lasers

Impact of a novel polishing method on the surface roughness and micromorphology of nanofilled and microhybrid composite resins

In vitro studies of nanosilver-doped titanium implants for oral and maxillofacial surgery

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