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nanotube arrays loaded with an antibacterial drug. The treated Ti substrate showed strong hydrophilicity, with a water contact angle of about 20°, and obviously inhibited early-stage bacterial adhesion. Moreover, this system displayed an enzyme-responsive release of antibacterial drug triggered by the hyaluronidase degradation of HA-c, which exhibited effective antibacterial ability and eliminated side effects caused by burst release of antibiotics. Meanwhile, the modified Ti substrates significantly promoted initial osteoblast adhesion through up-regulating the expression of adhesion-related genes, including integrin αv and β3. More importantly, this prepared coating with bacterial self-responsiveness improved osseointegration and prevented bacterial infection of Ti implants in vivo. Overall, our developed catechol-functionalized and bacterial self-responsive coating on Ti substrate has great significance in clinical applications of orthopedic and dental implants.
Zhang et al. (Mon,) studied this question.
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