Fig. 4

Histological (HE staining) observation of the bone cores 8 months postoperatively for the CGFs/DBBM and DBBM groups. a CGFs/DBBM group × 40; b CGFs/DBBM group × 100; c: DBBM group × 40; d DBBM group × 100. NB newly formed bone; RM residual materials; CT connective tissue