The result of the experiment. (A) and (B) show the situation of the wound 24 weeks after surgery; the wound healed well. (C) shows the gross view of reconstructed rib. (I) the flank group whose rib defect receives no material; (II) the control group whose rib defect received PDO cage/DBM; (III) the experimental group whose rib defect received PDO cage/DBM/BMSCs; (IV) the normal rib. The arrow shows the junction of the normal rib and scaffold.