Images: At 45 days, the bone mineralization rates of the (A) rhBMP-2/CPC and the (B) rhBMP-2/GM/CPC groups were greater than those of the (C) untreated group, and the rates of the rhBMP-2/GM/CPC group were greater than those of the rhBMP-2/CPC group. However, there were no differences in the mineralization rates among the (D) rhBMP-2/CPC, (E) rhBMP-2/GM/CPC, and (F) untreated groups at 140 days (Double fluorescent labeling; original magnification, ×100). Clinical Orthopaedics and Related Research® © The Association of Bone and Joint Surgeons® 2010 10.1007/s11999-010-1321-9