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Fig. 5 | Journal of Orthopaedic Surgery and Research

Fig. 5

From: Relationship between patellofemoral finite helical axis and femoral trans-epicondylar axis using a static magnetic resonance-based methodology

Fig. 5

Average FHA parameters during knee flexion. a Average patellar FHA in the midsagittal plane moved from the posterior to the anterior side of the TEA. b Average patellar FHA in the midsagittal plane moved from the inferior to the superior side of the TEA. c Average patellar rotational radius increased during 0°–10° flexion and then decreased slightly. d Average angle between patellar FHA and the TEA fluctuated by about 10° during 20°–90° knee flexion. e Average angle between patellar FHA and coronal plane was maintained at about 0° during 20°–90° knee flexion. f Average angle between patellar FHA and level plane fluctuated between − 10° and 10°

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