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To overcome this challenge, we present a dual crosslinking strategy that combines Schiff base chemistry for GelMA microgel stabilization with subsequent free\u2010radical photocrosslinking to form inter\u2010microgel covalent bonds. This technology yields stable microgels (S\u03bcG) that may be packed and photochemically interlinked in situ to form robust granular hydrogel scaffolds (GHS\n                    <jats:sup>S\u03bcG<\/jats:sup>\n                    ) under physiological conditions. The resulting GHS\n                    <jats:sup>S\u03bcG<\/jats:sup>\n                    support high cell viability and proliferation and have pore architecture and interconnectivity, as well as mechanical properties comparable to scaffolds fabricated using physically crosslinked GelMA microgels. This work is a step forward in developing translational granular biomaterials for the in situ tissue regeneration.\n                  <\/jats:p>","DOI":"10.1002\/btm2.70127","type":"journal-article","created":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T04:42:30Z","timestamp":1777437750000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Orthogonally crosslinked gelatin methacryloyl microgels for in situ assembly of granular hydrogel scaffolds"],"prefix":"10.1002","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7045-4337","authenticated-orcid":false,"given":"Zaman","family":"Ataie","sequence":"first","affiliation":[{"name":"Department of Chemical Engineering The Pennsylvania State University  Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nawaf Rajaa M.","family":"Alharbi","sequence":"additional","affiliation":[{"name":"Department of Biomedical Engineering 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