Biomimetic bone matrix materials was a kind of scaffold material which could be induction of bone seed cells transplantation and promotion of the growth of new bone,should have good properties of biodegradability,biocompatibility,mechanical strength and osteoinduction.Based on the preliminary research of the biomimetic bone matrix materials of polylactic acid(PLA),prepared covalent chemical bonds grafted PLA-g-HAP with initiation of surface hydroxyl groups of hydroxyapatite(HAP)and ring-opening polymerizati...