CMPw/PLLA骨折内固定材料的制备及强度性能研究

Preparation and strength properties of poly L-lactide(PLLA)/β-calcium metaphosphate whisker(CMPw) for internal fracture fixation

为了提高骨折内固定材料聚乳酸的力学强度及承载能力，通过玻璃结晶化方法制备得到长径比为30～50的偏磷酸钙晶须（CMPw），将CMPw与左旋聚乳酸（PLLA）复合，制得抗压强度为80MPa，抗弯强度为40MPa，断裂强度达到170MPa的复合材料。探讨了热处理温度、萃取条件、晶须含量、粉体粒径对偏磷酸钙产物形貌和复合材料强度的影响。

In order to increase the strength and load capability of poly L-lactide （PLLA） for fracture inner-fixation, the composite materials of PLLA and β-calcium metaphosphate whisker （CMPw） with the aspect ratio of 30～50 prepared by crystallizing in the glass were obtained. The compressive strength and bending strength of the composite could be nearly 80 and 40MPa, and the breaking strength had reached to 170MPa. The factors influencing the morphology and strength of the samples such as heating temperature, extraction condition, crystal content and powder diameter were discussed.