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(A) Schematic of KGN-loaded PLGA NPs, molecule structures of KGN and acrylated HA (m-HA). (B) Schematic of the surgical procedure for cartilage defect repair. (C) Schematic of the hyaline cartilage chondrogenesis with the photo-cross-linked HA scaffold encapsulated with KGN-loaded NPs. This figure was adapted with permission from Shi et al. [161]
