An implantable biodegradable medical device arranged for breast reconstruction and/or augmentation, made of an interconnected porous structured polymeric matrix and belonging to the family of poly(urea urethane)s. The porous structured polymeric matrix of the medical device comprises a plurality of three dimensional channels, drilled by means of heated tools, three-dimensionally propagating through the polymeric matrix ad interconnected with the porous structure of the polymeric matrix. The polymeric matrix comprises high to-medium molecular weight hydrophobic biodegradable amorphous soft segments polyols, having average molecular weight comprised between 20000 and 60000 Da,- hydrophilic polyalkoxide polyols, of average molecular weight comprised between 2000 and 15000 Da, and low molecular weight polyisocyanates and polyols, whose average molecular weights range between 15 and 200 Da.
