Melatonin-Hydrogel Delivery Systems for Effective Treatments of Periodontitis: Translational Perspectives from Material Designs to Clinical Applications - Ting Liu; Li Zhang; Qiong Zhang; Qitao Zhao; Sisi Gou; Yifo Liu; Run Zhong; Guowei Mao; Hao-Ying Li (Gels, 2026)