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The results of new-born bone tissue evaluation. The 3D reconstruction of control group (A) and PDA coating group (B), the black part represented the scaffold and the silver part represented the newly formed bone tissue. The bone volume/total volume in two groups (C), the bone bridging in two groups (D). Data were shown as mean ± SD, with **, P<0.01; ***, P<0.001. PDA, polydopamine.
