The invention belongs to the technical field of biomedical materials. The invention provides a preparation method of an ultrasonic
piezoelectric composite scaffold for promoting bone repair, which comprises the following steps: mixing
oxymatrine and saikoside C as a mixed
medicine; the mixed
medicine and a
stent obtained by
sintering hollow
barium titanate nanoparticles and hydroxyapatite
powder and performing high-pressure polarization treatment are jointly placed in water, after
adsorption equilibrium is achieved through stirring, the free mixed
medicine is removed, and the ultrasonic
piezoelectric composite stent for promoting bone repair is obtained. Wherein the weight ratio of the
oxymatrine to the saikoside C is (3-5): 1, and the weight ratio of the hollow
barium titanate nanoparticles to the hydroxyapatite
powder is 1: 1. According to the invention, the effect of the
stent material and the carried medicine on promoting bone repair is fully exerted, the synergistic effect of the material and the carried medicine on promoting osteogenic differentiation is realized, and the stent has a good application prospect.