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Effect of Silver Nanoparticles and silver hydroxyapatite nanoparticles on Color and Fracture Strength of Dental Ceramic

Aim of the study: investigation of the Effect of Silver Nanoparticles and silver hydroxyapatite nanoparticles on Color and Fracture Strength of Dental ceramic. Materials and Methods: Silver nanoparticle and silver hydroxyapatite nanoparticles of 40ug/ml concentration was added to Dental porcelain in a ratio 1:100 and manipulated by conventional method. A total of 30 samples were constructed. They were divided into 3 groups (10 samples each), group I without any modification, group II silver nanoparticles modified porcelain samples and group III silver hydroxyapatite modified porcelain samples. Then each group was subjected to color change test and fracture strength test (5 samples each). Color change was tested using a vita easy shade apparatus while fracture strength was measured using universal testing machine. Results were tabulated and statistically analyzed. Results: group II demonstrated higher fracture strength (30.3 ± 0.3 Mpa) than control group (group I) (25.9 ± 0.5Mpa). Whereas, group III showed lower fracture strength values (17.5 ± 1.5 Mpa) in comparison with the control group (25.9 ± 0.5Mpa). There was an increase in the lightness of group III (mean ∆L = 16.1) which created lighter samples than control, whereas there was a decrease in the lightness (mean ∆L = -24.9) in group II which created darker samples than control group. Conclusions: The addition of silver nanoparticles have been increased the fracture strength of dental ceramic. 2The addition of silver hydroxyapatite nanoparticles have been decreased the fracture strength of dental ceramic. 3Addition of silver nanoparticles and silver hydroxyapatite nanoparticles affected the color of dental ceramic adversely. [Cherif A Mohsen, Manal R. Abu-Eittah, Raiesa M M Hashem. Effect of Silver Nanoparticles and silver hydroxyapatite nanoparticles on Color and Fracture Strength of Dental Ceramic. Rep Opinion 2015;7(7):7882]. (ISSN: 1553-9873). http://www.sciencepub.net/report. 11