Effect of Adding Magnesium Oxide Nanoparticles on the Antimicrobial Activity of a Denture Soft Liner

Al-Sammaraie, Salem A. Salem

doi:10.25156/ptj.v10n2y2020.pp132-137

Cited by 4 publications

(2 citation statements)

References 34 publications

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“…These findings are in agreement with the results of the present study. Further, incorporating 3% of MgO-NPs into the denture soft liner notably enhanced its ability to combat C. albicans and S. aureus for a duration of up to six months [47]. On the other hand, soft liner with 0.1%, 0.2%, and 0.3% of MgO-NPs revealed a significant reduction in C. albicans CFU count, however, there was no inhibition zone around the specimens for disc diffusion assay, which is similar to the result of the present study [44].…”

Section: Discussionmentioning

confidence: 99%

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: Discussionmentioning

confidence: 99%

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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Section: Discussionmentioning

confidence: 99%

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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Effect of Adding Titanium Dioxide Nanoparticles on Some Mechanical Properties of Dental Alginate

Abdel-Rahman¹,

Omer²,

Saleh³

et al. 2022

SDJ

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Objective: This study aimed to evaluate the effect of adding titanium dioxide nanoparticles (TiO2NPs) on Shore A hardness, Young’s modulus, and tear strength of alginate impression material. Methods: Each test consists of one control group (alginate without TiO2NPs), and three test groups (2%, 3%, and 5%) of TiO2NPs were added, respectively. For each group, seven samples were constructed. For Shore A hardness, the samples were prepared according to ISO standards (7619-1:2010); Young’s modulus was calculated from the obtained Shore A hardness value according to a special standard equation. In contrast, for tear strength, the samples were prepared according to ASTM D 624-00. Results: The Control group exhibited a significantly less Shore A hardness value than all the other groups except the group that contained 2% TiO2NPs, where the increase in the hardness value was non-significant. A similar result was observed for Young’s modulus test, where the addition of TiO2NPs significantly increased Young’s modulus compared to the control group. Although, on the contrary, the tear strength was significantly improved by adding 3% TiO2NPs compared to control and other groups, there was a significant drop in the value of tear strength when 5% TiO2NPs were added to alginate. Conclusions: The addition of 3% TiO2NPs to dental alginate increased Shore A hardness, Young’s modulus, and significantly improved tear strength.

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Effect of Adding Magnesium Oxide Nanoparticles on the Antimicrobial Activity of a Denture Soft Liner

Cited by 4 publications

References 34 publications

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

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

Effect of Adding Titanium Dioxide Nanoparticles on Some Mechanical Properties of Dental Alginate

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