Yoshikazu Tsuneizumi

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We performed a CT-based computer simulation study to determine how the relationship between any inbuilt posterior slope in the proximal tibial osteotomy and cutting jig rotational orientation errors affect tibial component alignment in total knee replacement. Four different posterior slopes (3°, 5°, 7° and 10°), each with a rotational error of 5°, 10°, 15°,(More)
Computed tomography based computer simulation studies were made on fifty consecutive patients with osteoarthritis scheduled for TKA. Proximal tibial cutting was simulated with the cutting guide placed at different rotational errors (-10°, 0°, 10° and 20° of internal rotation) and different distances (4 cm and 8 cm) between the alignment rod and the bone.(More)
The aim of this study was to determine how much a distal femoral cutting error would affect the flexion-extension gap difference (flexion gap minus extension gap) in total knee arthroplasty (TKA). We evaluated 15 knees using a computer-simulation technique. Bone cutting errors of -2°, 2° and 4° of extension were simulated in three TKA systems. A distal(More)
Thirty-eight patients diagnosed with osteoarthritis underwent 41 cruciate-retaining total knee arthroplasties. In varus and valgus tests at flexion, subjects were seated on a table at 80° of knee flexion; 50 N was applied perpendicular to the lower leg. The factors affecting the postoperative flexion angle were investigated in a multiregression analysis.(More)
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