两步模压法制备聚乳酸/β-偏磷酸钙复合骨折内固定材料

Preparation of Poly L-Lactide(PLLA)/ β-Calcium Metaphosphate (β-CMP) Fracture Innerfixation Composites by a Two-step Method

以聚乳酸和自制β-偏磷酸钙晶须为原料,采用"两步模压法"制备聚乳酸/β-偏磷酸钙晶须复合骨折内固定材料,并对复合材料的力学性能进行了检测。结果表明采用"两步模压法"制备的复合材料的力学性能明显优于"一步模压法"制备的复合材料,其最大抗弯强度和杨氏模量分别为126.33 MPa和4.36 GPa,接近于人体皮质骨的力学性能,能满足人体骨折内固定对固定材料的力学性能要求。

A two-step method was used to prepare poly L-lactide(PLLA)/ β-calcium metaphosphate(β-CMP) fracture fixation composites.The mechanical strength of these composites was tested and the factors which would affect the mechanical strength were analyzed.The experimental results showed that the bending strength and Young s modulus of composites prepared by the two-step method were much better than those prepared by the two-step method,reached a maximum of 126.33 MPa and 4.36 GPa,respectively,which are close to tho...