Responsive Hydrogel Coatings for Implantable Devices: Innovations in Corrosion Protection and Stimuli-Triggered Drug Release

Hydrogel coatings are at the forefront of innovations aimed at improving the performance and biocompatibility of implantable medical devices. This review delves into the latest developments in dual-function, stimuli-responsive hydrogel coatings designed for metallic implants. These advanced coatings respond dynamically to environmental cues such as pH fluctuations, temperature changes, and ionic strength, enabling them to deliver therapeutic agents precisely when and where needed. By forming a protective, hydrated barrier on the implant surface, these hydrogels mitigate corrosion and limit metal ion release, addressing significant concerns related to implant degradation and biocompatibility. Simultaneously, they facilitate controlled, localized drug release—such as antibiotics or anti-inflammatory agents—in response to conditions indicative of inflammation or infection, enhancing the therapeutic efficacy and reducing systemic side effects. While the potential of these coatings is vast, their practical application is met with challenges, including maintaining strong adhesion to metallic surfaces, balancing biodegradability with mechanical integrity, and ensuring reliable, long-term biocompatibility and performance. Advances in nanomaterial integration, ۳D printing, and biomimetic designs are poised to address these limitations and expand the functionality of hydrogel coatings. Future prospects also point toward the integration of real-time monitoring and sustainability-driven synthesis using biodegradable materials. By exploring both achievements and obstacles, this paper underscores the transformative role of responsive hydrogel coatings in shaping safer, more effective medical implants and points to future directions that could further revolutionize their clinical applications.

کلیدواژه ها:

Responsive Hydrogel Coatings ، Implantable Medical Devices ، Corrosion Protection ، Stimuli-Triggered Drug Release ، Biocompatible Coatings ، Controlled Drug Delivery