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Radiographs of patients with focal degenerative cartilage defects prior to treatment with autologous chondrocyte grafts (BioSeed®-C). (a) This patient showed a Kellgren-Lawrence score of 2, with narrowing of the joint space (black arrowhead). (b) This patient showed a Kellgren-Lawrence score of 3, with narrowing of the joint space and osteophytes (white arrowheads).
