Implantable drug eluting device comprising a microporous structure

Implantable drug-eluting joint implant device comprising:

• a microporous structure, the microporous structure comprising unit cells, the unit cells comprising a plurality of bars and struts forming subelements having openings, the openings forming regularly arranged pores, the regularly arranged pores are in at least two different uniform sizes, a first size and a second size, wherein the pores are configured for receiving a drug and are being connected by interconnections, the interconnections being a hollow area originating from the pores of the first size having a first elution area and the interconnections originating from the pores of the second size having a second elution area, the interconnections being configured to convey the drug to a surface of the microporous structure for elution to surrounding tissue via the elution areas, wherein said first elution area and said second elution area are differently sized, and said first and second elution areas determine a rate of elution of any drug in the respective pores, and a ratio between the first elution area and the second elution area is predefined and selectable,
• wherein the microporous structure is formed by additive manufacturing on a base plane, and
• wherein the unit cells are tilted such that all of subelements are non-parallel to the base plane.