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Intraoperative radioscopic views of (A) passing of the 10 mm cannulated drill to the center of the necrotic area in both planes (AP and axial view), (B) the infusion of ex vivo-expanded autologous MSCs into the necrotic area and (C) the subsequent syringe filling of the drilling canal. In all cases, the guide wire was stopped at the subchondral bone of the necrotic area.
Abbreviation: AP, anteroposterior.
