الفهرس 
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Abstract
Aim: This study aimed at evaluating the antibacterial activity against Streptococcus
mutans and measuring the solubility percentage of nano-silver incorporated zinc
phosphate cement compared to conventional zinc phosphate cement.
Materials and Methods: A total number of 28 specimens were prepared (14
specimens for the antibacterial activity test and 14 specimens for the solubility
percentage test) For each test, half of the specimens were prepared from nano-silver
incorporated zinc phosphate cement (Test group) by the addition of (0.05 ml) of
silver nanoparticles (Ag-NPs) suspension to the conventional zinc phosphate cement
and the other half were prepared from the conventional zinc phosphate cement
(Control group) when used in a luting consistency. The Agar diffusion method was
used to evaluate the antibacterial activity of nano-silver incorporated zinc phosphate
cement against Streptococcus Mutans. While, the solubility percentage (%) test was
carried out according to ANSI/ADA no. 96. Data were statistically analyzed by
Kolmogorov-Smirnov, Shapiro-Wilk and Independent sample t-test. The significance
level was set at P ≤ 0.05.
Results: The results revealed that the addition of nano-silver suspension to the
conventional zinc phosphate cement showed significant increase in the antibacterial
activity against Streptococcus mutans and the solubility percentage.
Conclusion: Incorporation of the minimal inhibitory concentration of silver
nanoparticles (Ag-NPs) suspension in commercially available zinc phosphate cement
impart antibacterial activity against Streptococcus Mutans when used in a luting
consistency with clinically acceptable solubility percentage (%) values.