Result The main ingredients of PDB was hydroxyapatite,its protein was only on fifth,and it had natural pore system which possessed pore network system of original bone.

• 结果PDB的主要成份为羟基磷灰石,蛋白质含量仅有原骨组织的1/5,具有原骨组织的网状孔隙结构系统,原骨组织骨盐支架的三维多孔结构存在,对人胚骨膜成骨细胞的形态特征、细胞周期、倍体水平无有害影响。