The invention belongs to the field of biomedical materials and manufacturing thereof, and discloses a composite 3D printing
stent with a
time sequence regulation
blood vessel and
bone tissue regeneration function as well as a preparation method and application of the composite 3D printing
stent. The method comprises the following steps: respectively loading an osteogenesis
inducer and a vascular induced differentiation agent into two carrier materials with different degradation rates, and carrying out 3D printing and gel
coating modification according to a reverse sequence of a physiological repair process of carrying out vascularization first and then carrying out osteogenesis to form a composite 3D printing
stent of which the inner layer is loaded with the osteogenesis
inducer and the outer layer is loaded with the vascular induced differentiation agent. After the composite 3D printing stent is implanted into a body, according to different degradation rates of the
composite material, the repair and regeneration process of vascularization and osteogenesis is realized in a manner of degrading the gel
coating and degrading the 3D printing stent, and the composite 3D printing stent has good living compatibility,
biological activity and mechanical properties, and has good application prospects. The material can be used as a biomedical material for repairing or treating bone defects or self-repairing, and has a good application prospect in treatment and self-repairing of bone defects.