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Surface regularity: (A) A 31-year-old man with a talar osteochondral defect (OCD) lesion 8.7 years after autologous chondrocyte implantation (ACI) surgery demonstrating moderate irregularity of surface appearance of the ACI graft (~50% articular surface disruption). (B) A 36-year-old woman with a talar OCD lesion 3.4 years after ACI surgery demonstrating mild irregularity of surface appearance of the ACI graft (~25% articular surface disruption).
