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A silicalite-1 film ( SF ) deposited on Ti-6Al-4V alloy was investigated in this study as a promising coating for metallic implants. Two forms of  SFs  were prepared: as-synthesized  SFs  ( SF-RT ), and  SFs  heated up to 500 °C ( SF-500 ) to remove the excess of template species from the  SF  surface. The  SFs  were characterized in detail by X-ray photoelectron spectroscopy (XPS), by Fourier transform infrared spectroscopy (FTIR), by scanning electron microscopy (SEM) and water contact angle measurements (WCA). Two types of bone-derived cells (hFOB 1.19 non-tumor fetal osteoblast cell line and U-2 OS osteosarcoma cell line) were used for a biocompatibility assessment. The initial adhesion of hFOB 1.19 cells, evaluated by cell numbers and cell spreading area, was better supported by  SF-500  than by  SF-RT . While no increase in cell membrane damage, in ROS generation and in TNF-alpha secretion of bone-derived cells grown on both  SFs  was found, gamma H2AX staining revealed an elevated DNA damage response of U-2 OS cells grown on heat-treated samples ( SF-500) . This study also discusses differences between osteosarcoma cell lines and non-tumor osteoblastic cells, stressing the importance of choosing the right cell type model.

Heat treatment dependent cytotoxicity of silicalite-1 films deposited on Ti-6Al-4V alloy evaluated by bone-derived cells