Abstract
For hard tissue replacement, an implant with a multifunctional surface, which combines long term anticorrosion potential, osteogenesis and antibacterial properties is one of the most ideal products people strive for. In this work, stable Mn-containing titania coatings on titanium were obtained by introducing a strong electrolyte and strong oxidant, potassium permanganate (KMnO4), into a conventional micro-arc oxidation (MAO) electrolyte solution. The MAO-synthesized Mn-containing titania coating showed a compacted surface, which results in excellent anticorrosion capacity and provides a stable Mn delivery platform that can sustainedly release Mn ions at a desirably slow rate for more than 6 weeks. The subsequent releasing of Mn ions improves the osteogenic activity and antibacterial ability of the titania coating. Thus, we have combined osteogenesis and antibacterial properties in an Mn-containing titania coating, which provides insight into the design of better biomedical implant surfaces in the future.
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