Antimicrobial properties of acrylic resins for dentures impregnated with silver nanoparticles

Gligorijević, Nikola; Kostić, Milena; Tacic, Ana; Nikolić, Ljubiša; Nikolić, Vera

doi:10.5937/asn1775696g

Cited by 6 publications

(5 citation statements)

References 18 publications

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“…In another study 29 the growth inhibition zone was not displayed by adding 5% chitosan/zinc oxide nanoparticles, and growth inhibition zone was observed only by adding 10% concentration of these nanoparticles. The results of the DAD test in this study are in line with the results reported in a study by Gligorijević et al 30 which evaluated the antimicrobial activity of Ag nanoparticles on triplex acrylic self-cure. The researchers observed a growth inhibition zone in DAD test against Staphylococcus aureus at all concentrations of 2%, 5%, 10%, and 100%.…”

Section: Discussionsupporting

confidence: 91%

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Antimicrobial properties, anti-virulence activities, and physico-mechanical characteristics of orthodontic adhesive containing C-phycocyanin: a promising application of natural products

Pourhajibagher¹,

Bahador²

2021

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Introduction: Antimicrobial orthodontic adhesives aim to reduce enamel demineralization, white spot lesions, and incipient tooth decay around bonded orthodontic brackets, but they should not imperil its mechanical properties.  Aim: To evaluate the antimicrobial and physico-mechanical properties of acrylic containing different concentrations of C-phycocyanin on Streptococcus mutans, Lactobacillus acidophilus, and Candida albicans. Materials and methods: The mechanical properties of acrylic resins were measured by flexural strength test after preparation of acrylic resin samples with concentrations of 1%, 2%, 5%, 7.5%, and 10% of C-phycocyanin. Then we evaluated the antimicrobial effects of acrylic resin containing the maximum concentration of C-phycocyanin with clinically acceptable flexural strength and the changes in expression of virulence factors. Results: The highest and lowest means of flexural strength were obtained in acrylic resins containing 0% and 10% concentrations of C-phycocyanin at 50.2±4.5 and 30.1±3.3 MPa, respectively. Adding 1%, 2%, and 5% of C-phycocyanin showed no significant decrease in flexural strength (p>0.05). The maximum mean diameter of the growth inhibition zone was observed around discs containing 5% of C-phycocyanin. Until day 30 of the study, no microbial biofilms were formed on any acrylic disc. Only microbial biofilms of C. albicans were able to form on discs containing 5% of C-phycocyanin at 90 days. 5% C-phycocyanin could significantly decrease the expression levels of gtfB, hsp16, and ALS9 6.1-, 7.3-, and 3.9-fold, respectively. Conclusions: It can be concluded that the most acceptable concentration of C-phycocyanin in acrylic resin is 5% based on the results of flexural strength tests and antimicrobial activities of acrylic resin containing various concentrations of C-phycocyanin.

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Section: Discussionsupporting

confidence: 91%

“…The researchers observed a growth inhibition zone in DAD test against Staphylococcus aureus at all concentrations of 2%, 5%, 10%, and 100%. 30 In the current study, the inhibitory effect of microbial biofilm formation was also investigated. Biofilms have been shown to play a major role in causing dental caries and periodontal diseases.…”

Section: Discussionmentioning

confidence: 99%

Antimicrobial properties, anti-virulence activities, and physico-mechanical characteristics of orthodontic adhesive containing C-phycocyanin: a promising application of natural products

Pourhajibagher¹,

Bahador²

2021

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“…In the present study, MHA was used for disc diffusion assay because it has a relatively low agar content, which facilitates the uniform diffusion of antimicrobial agents through the agar medium [42]. None of the examined concentrations (1%, 3%, and 5% NPs) of PMMA-Ag and PMMA-MgO nanocomposite discs showed any inhibition zone against clinically isolated C. albicans, which is similar to the result of some other studies [29,43,44]. This result was due to the Ag-NPs not being released from the PMMA discs to enable the nanoparticles embedded in the PMMA to act as an agent to inhibit the growth of microorganisms on the surface of the discs.…”

Section: Discussionsupporting

confidence: 83%

Assessing the Impact of Modified Initial Abstraction Ratios and Slope Adjusted Curve Number on Runoff Prediction in the Watersheds of Sulaimani Province.

Abdulrahman,

Karim

2024

KJAR

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A popular way for describing the link between storm rainfall depth and direct runoff is the curve number (CN) method. It is a straightforward approach that has been extensively studied and widely adopted. However, there has been less focus on the impact of slope and the initial abstraction ratio, which is a crucial factor for accurately estimating direct runoff when utilizing the soil conservation service- Curve Number (SCS-CN) method. The initial abstraction ratio is typically assumed to be 0.20, as initially proposed by the method's developers. In this study, we analyzed daily rainfall data from seventeen watersheds in different physiographic locations in the Kurdistan region of Iraq, recorded between 2022 and 2023. Our aim was to assess the effect of slope adjusted curve number and modified the initial abstraction ratio (0.1) on estimation of direct runoff. The results demonstrated that adjusting the CN for slope and using a modified initial abstraction ratio increased the estimated runoff compared to the original method (without adjustment for slope and initial abstraction ratio=0.2). Therefore, when applying the SCS-CN method, it is crucial to correct the CN for slope in steeper areas and consider the initial abstraction ratio rather than relying on the suggested value of 0.2. this study highlights the importance of considering local conditions and estimating the initial abstraction ratio based on specific watershed characteristics to enhance the accuracy of direct runoff estimation using the CN method.

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Section: Discussionsupporting

confidence: 83%

Assessment of the Antifungal Activity of PMMA-MgO and PMMA-Ag Nanocomposite

Arf,

Kareem,

Khdir

et al. 2024

KJAR

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Orthodontic acrylic resin is used in the construction of orthodontic appliances. It lacks antimicrobial properties and is prone to microbial infection. So, the infection associated with it can be reduced via modification of orthodontic acrylic resin with nanoparticles (NPs) incorporation. The study directed to evaluate the antifungal properties of modified orthodontic acrylic resin incorporated with magnesium oxide (MgO)-NPs and silver (Ag)-NPs. NPs were mixed with polymethylmethacrylate (PMMA) in ethanol-assisted mixing method. Disc samples (10 mm in diameter and 2 mm thick) of PMMA-MgO, PMMA-Ag nanocomposites and PMMA alone (as control) were prepared. Then, C. albicans was isolated and identified clinically through taking swabs from acrylic denture base orthodontic appliances, cultured on a Sabouraud Dextrose Agar medium, followed by transferring on HiCrome™ candida Differential agar which is a selective and differential medium to distinguish distinct Candida species. The polymerase chain reaction was performed and the amplicon was separated by 2% gel electrophoresis and then visualised by ethidium bromide. DNA sequencing was performed on the sample at Sanger sequencing/ ABI 3500. Antifungal activity of PMMA-MgO and PMMA-Ag (1%, 3% and 5% of NPs) was conducted through disc diffusion assay and colony forming unit counts. The result showed a decrease in the number of adhered Candida albicans (C. albicans) of all concentrations of both nanocomposite and the decrease was statistically significant (P<0.05) in all experimental groups except MgO-NPs 1% and 3%. Increasing the concentration of NPs was associated with decrease in the adhered C. albicans. It was concluded that PMMA-MgO and PMMA-Ag nanocomposites showed anti-adherence activities against clinically isolated C. albicans in concentration dependent manner.

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Antimicrobial properties of acrylic resins for dentures impregnated with silver nanoparticles

Abstract: Sažetak Uvod. Poroznost i površinska adherentnost akrilata čine ih

Cited by 6 publications

References 18 publications

Antimicrobial properties, anti-virulence activities, and physico-mechanical characteristics of orthodontic adhesive containing C-phycocyanin: a promising application of natural products

Antimicrobial properties, anti-virulence activities, and physico-mechanical characteristics of orthodontic adhesive containing C-phycocyanin: a promising application of natural products

Assessing the Impact of Modified Initial Abstraction Ratios and Slope Adjusted Curve Number on Runoff Prediction in the Watersheds of Sulaimani Province.

Assessment of the Antifungal Activity of PMMA-MgO and PMMA-Ag Nanocomposite

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