AUTHOR=Chen Yanan , Zhao Qinghua TITLE=Innovative modification strategies and emerging applications of natural hydrogel scaffolds for osteoporotic bone defect regeneration JOURNAL=Frontiers in Bioengineering and Biotechnology VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/bioengineering-and-biotechnology/articles/10.3389/fbioe.2025.1591896 DOI=10.3389/fbioe.2025.1591896 ISSN=2296-4185