case_images: PMC6914986_01
case_images: Immediate postoperative radiography demonstrating good implant position and alignment.
case_images: CRIOR2019-5938598.001.jpg
case_images: PMC6914986_01_CRIOR2019-5938598.001.jpg
case_images: fig1
case_images: No abnormalities and problems with the positioning of the component were noted on the postoperative radiograph (Figure 1).
case_images: Plain radiography demonstrating a radiolucent line around the femoral component at the 1-year follow-up.
case_images: CRIOR2019-5938598.002.jpg
case_images: PMC6914986_01_CRIOR2019-5938598.002.jpg
case_images: fig2
case_images: Radiography revealed a radiolucent line around the femoral component (Figure 2).
case_images: Radiography demonstrating fracture and loosening of the femoral component at the 8-year follow-up. Marked narrowing of the medial joint space is also seen.
case_images: CRIOR2019-5938598.003.jpg
case_images: PMC6914986_01_CRIOR2019-5938598.003.jpg
case_images: fig3
case_images: At the 8-year postoperative follow-up, he complained of increasing right knee pain, and radiography revealed fracture of a metallic femoral component, loosening of the femoral component, and marked narrowing of the medial joint space (Figure 3).
case_images: A small crack sign is found in the femoral component, which had been missed at the (a) 6- and (b) 7-year postoperative follow-up.
case_images: CRIOR2019-5938598.004.jpg
case_images: PMC6914986_01_CRIOR2019-5938598.004.jpg
case_images: fig4
case_images: On careful analysis of past radiographs, a small crack sign was found in the femoral component, which had been missed at the 6- and 7-year postoperative follow-up (Figure 4).
case_images: (a) Fracture of the femoral component is noted intraoperatively. (b) Thick cement mantle observed at both lateral sides of the distal surface and at the medial side of the posterior surface (*). (c) Marked wear of the middle part of the polyethylene insert.
case_images: CRIOR2019-5938598.005.jpg
case_images: PMC6914986_01_CRIOR2019-5938598.005.jpg
case_images: fig5
case_images: Intraoperatively, a fracture and loosening of the femoral component were observed (Figures 5(a) and 5(b)). There was marked wear of the middle part of the polyethylene insert (Figure 5(c)).
case_images: Revision surgery using cemented bicruciate-retaining total knee arthroplasty.
case_images: CRIOR2019-5938598.006.jpg
case_images: PMC6914986_01_CRIOR2019-5938598.006.jpg
case_images: fig6
case_images: Therefore, we performed revision surgery using cemented BCR-TKA (Vanguard XP Total Knee System; Zimmer Biomet, Warsaw, IN, USA) based on the desire to preserve intact cruciate ligaments (Figure 6).