pH and Antimicrobial Activity of Portland Cement Associated with Different Radiopacifying Agents

Guerreiro-Tanomaru, Juliane Maria; Cornélio, A. L. G.; Andolfatto, Carolina; Salles, Loise Pedrosa; Tanomaru-Filho, Mário

doi:10.5402/2012/469019

Cited by 25 publications

(35 citation statements)

References 29 publications

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“…It has been reported that several microorganisms are very sensitive to alkaline media, among them, C. albicans. 41 We suggest that this is the basis for the fungicidal character of Bi 2 O 3 nanoclusters. Additionally, we cannot discard antifungal activity mechanisms involving free radicals, due to the presence of CO 2 in the culture media 42 and the inherent α-Bi 2 O 3 NPs photocatalytic properties.…”

Section: Discussionmentioning

confidence: 85%

Bismuth oxide aqueous colloidal nanoparticles inhibit Candida albicans growth and biofilm formation

Hernandez-Delgadillo¹,

Velasco‐Arias²,

Martinez-Sanmiguel³

et al. 2013

IJN

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Multiresistance among microorganisms to common antimicrobials has become one of the most significant concerns in modern medicine. Nanomaterials are a new alternative to successfully treat the multiresistant microorganisms. Nanostructured materials are used in many fields, including biological sciences and medicine. Recently, it was demonstrated that the bactericidal activity of zero-valent bismuth colloidal nanoparticles inhibited the growth of Streptococcus mutans; however the antimycotic potential of bismuth nanostructured derivatives has not yet been studied. The main objective of this investigation was to analyze the fungicidal activity of bismuth oxide nanoparticles against Candida albicans, and their antibiofilm capabilities. Our results showed that aqueous colloidal bismuth oxide nanoparticles displayed antimicrobial activity against C. albicans growth (reducing colony size by 85%) and a complete inhibition of biofilm formation. These results are better than those obtained with chlorhexidine, nystatin, and terbinafine, the most effective oral antiseptic and commercial antifungal agents. In this work, we also compared the antimycotic activities of bulk bismuth oxide and bismuth nitrate, the precursor metallic salt. These results suggest that bismuth oxide colloidal nanoparticles could be a very interesting candidate as a fungicidal agent to be incorporated into an oral antiseptic. Additionally, we determined the minimum inhibitory concentration for the synthesized aqueous colloidal Bi 2 O 3 nanoparticles.

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Section: Discussionmentioning

confidence: 85%

Bismuth oxide aqueous colloidal nanoparticles inhibit Candida albicans growth and biofilm formation

Hernandez-Delgadillo¹,

Velasco‐Arias²,

Martinez-Sanmiguel³

et al. 2013

IJN

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“…The antimicrobial activity evaluation showed similar results for all the microorganisms evaluated. The addition of substances to MTA aiming to improve its antimicrobial effect has been studied [27][28][29] . Odabas et al 29) demonstrated that silver addition to MTA improves its antimicrobial property.…”

Section: Discussionmentioning

confidence: 99%

“…Saatchi 27) et al observed that the inclusion of potassium iodide does not alter the antimicrobial effect of MTA. GuerreiroTanomaru et al 28) showed that Portland cement-based materials with the addition of different radiopacifiers (bismuth oxide, calcium tungstate, and zirconium oxide) presented antimicrobial activity and pH similar to pure PC. The alkaline pH of MTA may be important for the calcium carbonate formation, which could contribute to the sealing ability of MTA 30) .…”

Section: Discussionmentioning

confidence: 99%

Radiopacity, pH and antimicrobial activity of Portland cement associated with micro- and nanoparticles of zirconium oxide and niobium oxide

et al. 2014

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The aim of this study was to evaluate some properties of the calcium silicate materials Mineral Trioxide Aggregate (MTA) and Portland cement (PC) with microparticulated (micro) and nanoparticulated (nano) zirconium oxide (ZrO 2 ) or niobium oxide (Nb 2 O 5 ). The experimental materials: White PC (PC), MTA-Angelus ® (MTA), PC+ZrO 2 micro, PC+ZrO 2 nano, PC+Nb 2 O 5 micro and PC+Nb 2 O 5 nano were submitted to radiopacity and pH evaluations. Furthermore, the antimicrobial activity against different microorganisms was assessed by agar diffusion test. MTA presented higher radiopacity than other materials. However, all materials except PC presented higher radiopacity than recommended by ISO/ADA. MTA promoted higher pH values in all analyzed periods (p≤0.05). At the initial periods, PC and PC+ZrO 2 micro showed pH similar to MTA. All materials showed antimicrobial activity against the evaluated microorganisms. In conclusion, ZrO 2 and Nb 2 O 5 could be alternative radiopacifiers to be added to calcium silicate materials.

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“…The solubility of the components of Portland cementbased endodontic restoratives impacts upon their sealing capacity, mechanical stability, antimicrobial properties, biocompatibility and bioactivity [18][19][20][21] . For example, soluble calcium and silicate species are acknowledged to stimulate bone tissue regeneration 18,19) .…”

Section: Discussionmentioning

confidence: 99%

Hydration kinetics, ion-release and antimicrobial properties of white Portland cement blended with zirconium oxide nanoparticles

Coleman

2014

Dent. Mater. J.

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This study examines the impact of 20 wt% zirconium oxide nanoparticles on the early hydration kinetics of white Portland cement by isothermal conduction calorimetry and transmission electron microscopy. The findings confirm that the nano-ZrO2 particles do not directly participate in the chemical reactions during cement hydration; although, they do divert the normal hydration processes and accelerate the initial setting reactions. The rate of heat evolution and the extent of the exotherm associated with these reactions are reduced in the presence of nano-ZrO2. The incorporation of nano-ZrO2 into the cement also decreases the solubility of the silicate phases but does not compromise its capacity to release hydroxide ions. There was no observed difference in the antimicrobial activity of the nano-ZrO2-blended and unblended cement pastes against S. aureus and E. coli; however, a modest reduction in this property was noted against P. aeruginosa for the blended cement.

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pH and Antimicrobial Activity of Portland Cement Associated with Different Radiopacifying Agents

Cited by 25 publications

References 29 publications

Bismuth oxide aqueous colloidal nanoparticles inhibit Candida albicans growth and biofilm formation

Bismuth oxide aqueous colloidal nanoparticles inhibit Candida albicans growth and biofilm formation

Radiopacity, pH and antimicrobial activity of Portland cement associated with micro- and nanoparticles of zirconium oxide and niobium oxide

Hydration kinetics, ion-release and antimicrobial properties of white Portland cement blended with zirconium oxide nanoparticles

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