Abstract: A biodegradable osteochondral implant comprises a porous top and a porous bottom section separated by a barrier impermeable to agents that have a detrimental effect on the regeneration of cartilage. The implant or its top section is of rotationally symmetric or parallelepipedal form and comprises a resilient polymer material such as polyurethane urea. Also disclosed is a corresponding sheet material from which implants can be excised, processes of manufacture of the implant and the sheet material, and a method for implanting the osteochondral implant in a recess prepared in a load-bearing surface of a joint.