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Fig. 3 | Arthroplasty

Fig. 3

From: Arithmetic hip knee angle measurement on long leg radiograph versus computed tomography—inter-observer and intra-observer reliability

Fig. 3

CT measurement. A mechanical alignment starting point of TKA component positioning. B Components tilted to achieve symmetrical resections (6.5 mm) from distal femur medially and laterally and proximal tibia medially and laterally to give a femoral component valgus of 2.5° (LDFA = 90° – 2.5° = 87.5°) and tibial component varus of 7.0° (MPTA = 90° – 7.0° = 83°) for an overall AHKA of –4.5° or 4.5° varus (MPTA – LDFA = 83° – 87.5°)

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Arthroplasty

ISSN: 2524-7948

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