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A schematic illustration showing a dual-layer structure of STH that can be injected through a customized multineedle injecting device. Osteogenic hydrogels consist of silicate nanoplatelet-based STH that encapsulates osteogenic cells. STH can also incorporate VEGF-loaded PCL nanoparticles to deliver endothelial cells. Injected hydrogel structure can fill the bone defect of any shape and size.
