Optimal Trochanter Major Position During Functional Activities in Healthy Individuals
Torsional abnormalities of the proximal femur are highly prevalent in the presence of hip pain, with a reported prevalence of 17% in patients who are eligible for hip preservation surgery for femoroacetabular impingement (FAI) or developmental hip dysplasia (DHH). Abnormal femoral torsion (FT) is a well-established independent risk factor for the development of early hip osteoarthritis as increased FT could cause under-coverage of the femoral head, resulting in an overload of the anterosuperior joint and posterior, extra-articular, ischiofemoral impingement with levering out of the femoral head, whereas a decreased FT could lead to anterior femoroacetabular impingement (FAI). Untreated FT abnormalities could compromise the results of open and arthroscopic hip preservation surgeries for FAI. Although torsional abnormalities of the proximal femur can be addressed with a subtrochanteric rotational osteotomy, the optimal FT correction remains unknown. Variations of the rotational morphology of the proximal femur might have a profound effect on hip biomechanics, as FT could influence the hip range of motion (especially internal and external rotation), the position of the greater trochanter (GT), periarticular muscle lever arms and gait pattern. FT angles and clinical evaluation of the patient (especially passive internal rotation of the hip) are the base of current recommendations for rotational osteotomies. However, in many cases, femoral and tibia torsion (TT) values measured on computer tomography (CT), the gold standard method for measuring FT and TT, are not consistent with the rotational profile during gait as observed during the clinical examination or gait analysis, suggesting a dynamic compensation.
3D reconstruction from bi-planar radiographs
Development of a pipeline for learning-based 3D reconstruction from bi-planar radiographs using anatomical mesh templates.

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