Fig. 1

Schematic illustration of the preparation of LR@PDH and its mechanism for periodontitis treatment. a Illustration of the procedure for preparation of LR@PDH. b Illumination of LR@PDH ROS-scavenging, adhesion, and microflora regulation to the periodontitis. c Illumination of LR@PDH regulation of periodontal inflammatory environment. Created in https://BioRender.com