Methods Bone defects or unities due to limb traumas or infections were treated with the free bone grafts through bonemarrowcavity, and then fixed with internal or external fixations;
KGS could also improve the pathological changes in microstructure of bone, increase the thickness of trabecula and cortex (P <0.05) , reduce the trabecular gap and bonemarrowcavity (P<0 . 05) .
To compare with autologous bone graft, deproteined bovine cancellous bone and an autogenous red marrow had an identical effect for repairing bony cavity defect.