Objective To study the feasibility of polylactic acid(PLA) as carrier of bone morphogenetic protein(BMP), and observe its results of inducing osteogenesis.

• 目的探讨聚乳酸（ polylactic acid, PLA）作为骨形态发生蛋白（ bone morphogenetic protein, BMP）载体的可行性及观察其诱导成骨能力。