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½áÌâÓ¢ÎÄÕªÒª        It is well known that electrical microenvironment if one of the most imoortant environment for the grown of the osteoblasts. The stimulation of a real electronic environment is of great important on the regeneratiion and reconstruction of osteoblasts,and promotion of the ossointegration of bone implants. Therefore, it is expected that the introduction of an electronic signal to the coating materials can improve its overall performance and ensure the successful implantation. Conducting polymer polypyrrole(PPy) has many attractive properties that differ from the normal polymers, such as excellent conductivity; can be directly synthesized on the surface of metal implants; good non-corrosibility and biocompatibility. It is obviously that the PPy has the great potential to be an ideal coating material of the bone metal implants due to such properties.In the present project,a PPy nanowire coating on the surface of titanium, one of the most important metal implants, was developed and the interaction between the nanowires and the osteoblasts was also investigated. The experimental results indicated that the osteoblasts cultured on the PPy nanowires subjected to current stimulus through the coating showed significant increasing adhesion on the material. The PPy nanowires showed better biocompatibility than the PPy with normal morphology and could enhance the total protein synthesis, ALPase activity, osteocalein and calcium-containg in the extracellular matrix by current stimulus.
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