PMC6914986_01
Immediate postoperative radiography demonstrating good implant position and alignment.
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No abnormalities and problems with the positioning of the component were noted on the postoperative radiograph (Figure 1).
Plain radiography demonstrating a radiolucent line around the femoral component at the 1-year follow-up.
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Radiography revealed a radiolucent line around the femoral component (Figure 2).
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.
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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).
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.
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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).
(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.
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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)).
Revision surgery using cemented bicruciate-retaining total knee arthroplasty.
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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).