Compression-resistant collagen-based artificial bone repair material

A compression-resistant collagen-based artificial bone repair material, characterized in that the material is a dense-porous bi-layer organic/inorganic composite, wherein,

• said organic phase contains both collagen and polyester, said polyester is one or more of poly (lactic acid), poly (glycolic acid), poly (lactic-co-glycolic acid), polycaprolactone and polydioxanone,
• the inorganic phase contains nano-sized calcium phosphate salt,
• the weight ratio of the organic phase to the inorganic phase is 9/1˜2/8, and
• the weight ratio of collagen to poly (lactic acid) is 9/1˜1/9;
• said bi-layer structure contains:
• a dense layer as the lower layer, with a thickness of 0.5˜5 mm, a compressive strength of 65˜150 MPa and a bending strength of 20˜100 MPa, and
• a porous layer as the upper layer, with a thickness of 0.5˜5 mm and a porosity of 50%˜80%.