Peripheral nerve injury (PNI), a challenging neurosurgery issue, often leads to partial or complete loss of neuronal functions and even neuropathic pain. Thus far, the gold standard for treating peripheral nerve deficit remains autografts. While numerous reviews have explored PNI and regeneration, this work distinctively synthesizes recent advancements in tissue engineering—particularly four-dimensional (4D) bioprinting and exosome therapies—with an emphasis on their clinical translation. By consolidating findings spanning molecular mechanisms to therapeutic applications, this review proposes an actionable framework for advancing experimental strategies toward clinically viable solutions. Our work critically evaluates emerging innovations such as dynamically adaptive 4D-printed nerve conduits and exosome-based therapies, underscoring their potential to match conventional autografts in achieving functional restoration.
Impact Statement
Although several previous reviews have been made on describing with great detail the degenerative and regenerative mechanisms of the peripheral nervous systems, as well as the several existing and exploratory treatment strategies, we focus more on the latest advancements of each of those topics.
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