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Fabrication and multiscale characterization of 3D silver containing bioactive glass-ceramic scaffolds

Bioactive Materials 2019年第1期4卷 215-223页

作者： Adam C.Marsh nathan p.mellott Natalia pajares-Chamorro Martin Crimp Anthony Wren Neal D.Hammer Xanthippi Chatzistavrou Department of Chemical Engineering&Materials Science Michigan State UniversityEast LansingMIUSA Alfred University Kazuo Inamori School of EngineeringAlfredNYUSA Department of Microbiology&Molecular Genetics Michigan State UniversityEast LansingMIUSA

In this work,we fabricated and characterized bioactive 3D glass-ceramic scaffolds with inherent antibacterial *** sol-gel(solution-gelation)technique and the sacrificial template method were applied for the fabrication of 3D highly porous scaffolds in the 58.6SiO2-24.9CaO-7.2p2O5-4.2Al2O3–1.5Na2O−1.5K2O–2.1Ag2O system(Ag-BG).This system is known for its advanced bioactive and antibacterial *** fabrication of 3D scaffolds has potential applications that impact tissue *** study of the developed scaffolds from macro-characteristics to nano-,revealed a strong correlation between the macroscale properties such as antibacterial action,bioactivity with the microstructural characteristics such as elemental analysis,*** homogeneity,morphological,and microstructural characteristics of the scaffolds were studied by scanning electron microscopy associated with energy dispersive spectroscopy(SEM-EDS),transmittance electron microscopy(TEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XpS),Fourier transform infrared spectroscopy(FTIR),and UV-visible spectroscopy *** compressive strength of the 3D scaffolds was measured within the range of values for glass-ceramic scaffolds with similar compositions,porosity,and pore *** capability of the scaffolds to form an apatite-like phase was tested by immersing the scaffolds in simulated body fluid(SBF)and the antibacterial response against methicillin-resistant Staphylococcus aureus(MRSA)was *** formation of an apatite phase was observed after two weeks of immersion in SBF and the anti-MRSA effect occurs after both direct and indirect exposure.

关键词： 3D glass-ceramic scaffolds Nano and macro structural properties Bioactivity Antibacterial properties Silver

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