Fig. 3

a–c Postoperative anteroposterior and lateral knee radiographs taken at 5 years (a), 6 years (b), and 7 years (c) after the implantation of articulating spacers. (a, b) Radiolucent lines along the bone-cement interface. (b) The longitudinal split fracture of the femoral articulating spacer component (arrow) with cortical breakage of the medial femoral condyle (arrowhead) observed at 7 years after the implantation of articulating spacers