Multifunctional Bioinspired Hydrogels for Biomedical Applications: From Design to Clinical Potential

Hydrogels are 3-dimensional (3D), hydrophilic polymeric networks capable of absorbing and retaining substantial amounts of water while preserving their structural integrity. Due to their high biocompatibility, tunable physicochemical properties, and structural resemblance to the natural extracellular matrix, hydrogels have emerged as promising candidates for a wide spectrum of biomedical applications. This review presents a comprehensive examination of recent advances in hydrogel design, synthesis, and functionalization strategies, including the development of smart hydrogels with stimuli-responsive, self-healing, and conductive properties. Cutting-edge fabrication techniques, such as 3D bioprinting, microfluidic templating, and photopatterning, are discussed in relation to enhancing hydrogel functionality for targeted clinical use. A special emphasis is placed on their applications in drug and gene delivery, tissue engineering, and regenerative medicine, with a focus on challenging medical conditions such as bone tissue engineering, cancer therapy, liver regeneration, myocardial infarct repair, diabetic wound healing, and lung tissue reconstruction. Furthermore, this review explores the translational landscape, including ongoing clinical trials, regulatory hurdles, and commercialization efforts. Emerging directions such as 4D dynamic hydrogels, artificial-intelligence-guided hydrogel optimization, and integration with wearable and implantable biomedical devices are also highlighted. By connecting fundamental materials science with critical medical needs, this review highlights the transformative potential of hydrogels in shaping the future of personalized and regenerative healthcare.