Nanoparticle-Hydrogel composites: Research progress in the treatment of periodontitisZishan Zhao, Jiaxin Yang, Ruoyao Lu, Luyi Xiang, Xiaohui Wang, Bo Li, Yang Liu and Xiaolong GuoE3S Web Conf., 561 (2024) 03003DOI: https://doi.org/10.1051/e3sconf/202456103003