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Preparation of a polycaprolactone/silica particle (PCL/SP) scaffold with bone morphogenetic protein 2 (BMP2)-conjugated SPs (BCSPs) by 3D printing. PCL scaffolds was fabricated with 10 wt% SPs. The prepared scaffold was coated with a 10 µg/mL collagen solution and its surface was conjugated with 2 μM BCSPs. A Structure of the fabricated scaffold. B Image of fabricated scaffold by 3D printing. C–E SEM images of the BCSP-conjugated scaffold
