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    Acrylic Bone Cements Modified with Graphene Oxide: Mechanical, Physical, and Antibacterial Properties

    Year: 2020

    Journal: Polymers, Volume 12, AUG

    Authors: Zapata, Mayra Eliana Valencia; Ruiz Rojas, Lina Marcela; Mina Hernandez, Jose Herminsul; Delgado-Ospina, Johannes; Tovar, Carlos David Grande

    Organizations: Sistema General de Regalias-FCTeI-Colombia [BPIN: 2013000100300]

    Keywords: acrylic bone cement; antibacterial activity; graphene oxide; mechanical properties; physical properties

    Bacterial infections are a common complication after total joint replacements (TJRs), the treatment of which is usually based on the application of antibiotic-loaded cements; however, owing to the increase in antibiotic-resistant microorganisms, the possibility of studying new antibacterial agents in acrylic bone cements (ABCs) is open. In this study, the antibacterial effect of formulations of ABCs loaded with graphene oxide (GO) between 0 and 0.5 wt.% was evaluated againstGram-positivebacteria:Bacillus cereusandStaphylococcus aureus, andGram-negativeones:Salmonella entericaandEscherichia coli. It was found that the effect of GO was dependent on the concentration and type of bacteria: GO loadings >= 0.2 wt.% presented total inhibition ofGram-negativebacteria, while GO loadings >= 0.3 wt.% was necessary to achieve the same effect withGram-positivesbacteria. Additionally, the evaluation of some physical and mechanical properties showed that the presence of GO in cement formulations increased wettability by 17%, reduced maximum temperature during polymerization by 19%, increased setting time by 40%, and increased compressive and flexural mechanical properties by up to 17%, all of which are desirable behaviors in ABCs. The formulation of ABC loading with 0.3 wt.% GO showed great potential for use as a bone cement with antibacterial properties.
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