Fig. 13. Micro-CT analysis of newly formed bone in rabbit radialis defect region implanted with the collagen sample and UHANWs/Col porous nanocomposite for 4, 8 and 12 weeks post-implantation: (a) three-dimensional (3-D) reconstructed rabbit radialis images; (b) the percentage of new bone volume to tissue volume (BV/TV); (c) trabecular number (Tb.N) in the defects. *, p < 0.05 compared with the collagen sample.