{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,10]],"date-time":"2026-09-10T13:30:05Z","timestamp":1789047005945,"version":"build-2803163510"},"reference-count":125,"publisher":"Oxford University Press (OUP)","license":[{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,1,12]]},"abstract":"<jats:title>Synopsis<\/jats:title>\n                  <jats:p>Biological puncture systems span microorganisms, plants, invertebrates, and vertebrates, yet all must solve a common mechanical problem: creating a localized fracture in a protective barrier while avoiding failure of the penetrating structure and minimizing damage to the target. Living systems therefore provide diverse natural solutions to the same fundamental mechanical challenges faced by microneedles, making them useful comparators for bioinspired puncture design. This review examines representative biological puncture systems\u2014including bacterial secretion needles, jellyfish nematocysts, insect stylets, snake fangs, plant trichomes, and drilling gastropods\u2014through a unified mechanics-based framework encompassing biological context, geometry, materials, insertion dynamics, and functional integration. The comparative synthesis identifies that the apparent biological diversity collapses into a recurring mechanical design space governed by four recurring requirements: stress concentration, structural stability, interface control, and reduction of target resistance. Across taxa, successful puncture is achieved through convergent strategies including high-aspect-ratio geometries, localized reinforcement, material-property gradients, dynamic insertion mechanisms, lubrication, and multicomponent architectures. Building on a mechanical definition of pain in which nociceptor activation arises primarily from tissue deformation, displacement, and shear rather than barrier fracture itself, we identify bioinspired principles for painless microneedle design. By comparing how biological systems achieve barrier breach while controlling structural failure and target disturbance, the review identifies design principles that can be translated to microneedles. The analysis suggests that the fundamental objective of biological puncture systems is not to maximize insertion force or penetration depth, but to create the required barrier breach while minimizing the volume of mechanically disturbed tissue. Key design implications include maximizing stress concentration, minimizing prefracture indentation, maintaining insertion stability, reducing friction, and limiting penetration to the depth necessary for barrier traversal. These findings provide a unifying biomechanical framework for translating biological puncture strategies into next-generation microneedles for minimally invasive drug delivery and diagnostics.<\/jats:p>","DOI":"10.1093\/icb\/icag157","type":"journal-article","created":{"date-parts":[[2026,8,22]],"date-time":"2026-08-22T11:42:18Z","timestamp":1787398938000},"source":"Crossref","is-referenced-by-count":0,"title":["The Mechanics of Biological Puncture: From Natural Penetrators to Painless Microneedles"],"prefix":"10.1093","volume":"66","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6790-9986","authenticated-orcid":false,"given":"Dev","family":"Gurera","sequence":"first","affiliation":[{"name":"Department of Materials Science and Engineering, University of Michigan , Ann Arbor, MI 48109 ,","place":["USA"]},{"name":"Biointerfaces Institute, University of Michigan , Ann Arbor, MI 48109 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