head-to-head polymer
1.Objectives To observe the pathological changes after BMP 2/TGF β 1 adsorbing CPPf(calcium polyphosphate fiber)/ PLLA(poly L Lactic acid) porous polymer being infilled into the necrotic areas of the femoral head, and evaluate their activity of osteoinduction and biodegradation in attempt to find a new therapy for femoral head necrosis(FHN).
