PLLA scaffolds with hierarchical porous structure were fabricated via a thermal induced phase separation in a 1,4-dioxane/water system.The effects of coarsening and the ratio of solvent/non-solvent on scaffold structure and properties were studied.Results indicated that the ratio of solvent/non-solvent affected the morphology of scaffolds.The scaffolds with interconnected and hierarchical porous structure presented macropores up to 300μm and micropores below 10μm embeded in the wall of macropores,when the r...