Fig. 4. Preoperative radiographs of the right knee of a 64-year-old woman with a prior history of high tibial osteotomy 14 years ago. The joint line height and Insall-Salvati ratio were well preserved after conversion total knee arthroplasty (15.3 mm vs. 16.6 mm and 1.21 vs. 1.19, respectively). The radiographically measured amount of tibial bone resection was 3.1 mm.
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