Fig. 4
Photothermal-responsive SMPU/Mg scaffolds for bone repair. A Schematic diagram of preparation of small volume SMPU/Mg scaffolds and recovery of their shape. B The process of shape recovery of SMPU/Mg scaffolds under NIR (808 nm, 1 W/cm2) irradiation. OS, original shape; TS-1, Temporary shape-1; TS-2, Temporary shape-2; RS, recovered shape. C SMPU/Mg scaffold shape recovery induced by NIR laser under 100g weight compression. Scale bar: 50 μm. D Schematic illustration of in vivo application of SMPU/Mg scaffolds. E The process of implantation of SMPU/Mg scaffolds and shape recovery under NIR irradiation. Scale bar: 5mm. F Equivalent stress distribution by finite element analysis of SMPU/Mg scaffolds indicate tight contact of the scaffold with the skull. Reproduced with permission [54]. Copyright 2022, Elsevier