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Cell/surface interactions on laser micro-textured titanium-coated silicon surfaces

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Abstract

This paper examines the effects of nano-scale titanium coatings, and micro-groove/micro-grid patterns on cell/surface interactions on silicon surfaces. The nature of the cellular attachment and adhesion to the coated/uncoated micro-textured surfaces was elucidated by the visualization of the cells and relevant cytoskeletal & focal adhesion proteins through scanning electron microscopy and immunofluorescence staining. Increased cell spreading and proliferation rates are observed on surfaces with 50 nm thick Ti coatings. The micro-groove geometries have been shown to promote contact guidance, which leads to reduced scar tissue formation. In contrast, smooth surfaces result in random cell orientations and the increased possibility of scar tissue formation. Immunofluorescence cell staining experiments also reveal that the actin stress fibers are aligned along the groove dimensions, with discrete focal adhesions occurring along the ridges, within the grooves and at the ends of the cell extensions. The implications of the observed cell/surface interactions are discussed for possible applications of silicon in implantable biomedical systems.

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Correspondence to Wolé Soboyejo.

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Mwenifumbo, S., Li, M., Chen, J. et al. Cell/surface interactions on laser micro-textured titanium-coated silicon surfaces. J Mater Sci: Mater Med 18, 9–23 (2007). https://doi.org/10.1007/s10856-006-0658-9

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