A porous implant matrix consists mainly of a mixture of polymers which are differently rapidly degradable, wherein nominal resorption times of two of the components of the mixture, each accounting for at least 10% of the mixture, differ by a factor of at least 5. The porous implant matrix is manufactured from a mixture of the at least two differently rapidly degradable polymers, wherein particles of both polymers are mixed with particles of a water-soluble solid and a solvent for one of the polymers, and after evaporating the solvent is optionally compacted, and the solid is removed by watering.一種多孔性植入基質,主要係由不同之可快速降解的聚合物的混合物所構成,其中該混合物之成分中的兩者的額定再吸收時間相差至少5倍,此兩者中的每一者佔該混合物的至少10%。此多孔性植入基質係由至少兩種不同之可快速降解之聚合物的混合物所製造,其中此兩種聚合物的粒子係與水溶性固體粒子及該等聚合物中之一者所用之溶劑混合,然後在蒸發溶劑後選擇性地使混合物結實,接著藉著澆水來移除該固體。S1‧‧‧製造無孔隙或較少孔隙之聚合物層S3‧‧‧形成兩種聚合物、固體孔隙形成劑、聚合物用之溶劑的一混合物層S5‧‧‧蒸發溶劑S7‧‧‧澆水以移除孔隙形成劑