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Image Quiz A Complication of Modular Revision Total Knee Arthroplasty1 | ||||||||||
| An eighty-two-year-old man had a revision total knee arthroplasty in 1987 because of aseptic loosening of the femoral component. An Insall-Burstein-II constrained condylar knee prosthesis (Zimmer, Warsaw, IN) that included femoral and tibial components with intramedullary stems was implanted. Locking screws were used to reinforce the Morse taper junctions between the intramedullary stems and the femoral and tibial components. The femoral and tibial components were fixed to bone with acrylic polymethylmethacrylate cement, and the fluted stems were press-fit in the intramedullary canals without cement. The patient did well until two years postoperatively, when he began to have persistent pain, a decreased range of motion, and crepitus in the right knee. | ||||||||||
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 Figure 1-A: Immediate postoperative anteroposterior radiograph of the right knee, showing an Insall-Burstein-II constrained condylar knee prosthesis that included posterior stabilized femoral and tibial components with press-fit intramedullary stems. |
 Figure 1-B: Follow-up anteroposterior radiograph made fifteen months after the revision, when the patient was minimally symptomatic. |
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What is the diagnosis? | ||||||||||
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