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Influence of loading direction due to physical activity on proximal femoral growth tendency
KTH, School of Engineering Sciences (SCI), Engineering Mechanics. KTH, School of Engineering Sciences (SCI), Centres, BioMEx. (KTH MoveAbility Lab)ORCID iD: 0000-0002-4701-8860
KTH, School of Engineering Sciences (SCI), Engineering Mechanics. KTH, School of Engineering Sciences (SCI), Centres, BioMEx. (KTH MoveAbility Lab)
KTH, School of Engineering Sciences (SCI), Engineering Mechanics. KTH, School of Engineering Sciences (SCI), Centres, BioMEx. Department of Women's & Children's Health, Karolinska Institutet, Stockholm, Sweden. (KTH MoveAbil Lab)ORCID iD: 0000-0001-5417-5939
2021 (English)In: Medical Engineering and Physics, ISSN 1350-4533, E-ISSN 1873-4030, Vol. 90, p. 83-91Article in journal (Refereed) Published
Abstract [en]

Longitudinal bone growth is regulated by mechanical forces arising from physical activity, whose directions and magnitudes depend on activity kinematics and intensity. This study aims to investigate the influence of common physical activities on proximal femoral morphological tendency due to growth at the femoral head growth plate. A subject-specific femur model based on magnetic resonance images of one able-bodied 6-year old child was developed, and the directions of hip contact force were described as load samples at a constant magnitude. Finite element analysis was performed to predict growth rate and growth direction, and expected changes in neck-shaft angle and femoral anteversion were computed corresponding to circa 4 months of growth. For most loading conditions, neck-shaft angle and femoral anteversion decreased during growth, corresponding to the femur & rsquo;s natural course during normal growth. The largest reduction in neck-shaft angle and femoral anteversion was approximately 0.25 degrees and 0.15 degrees. Our results suggest that most common physical activities induce the expected morphological changes in normal growth in able-bodied children. Understanding the influence of contact forces during less common activities on proximal femoral development might provide improved guidelines and treatment planning for children who have or are at risk of developing a femoral deformity.

Place, publisher, year, edition, pages
Elsevier BV , 2021. Vol. 90, p. 83-91
Keywords [en]
Osteogenic index, Octahedral shear stress, Hydrostatic stress, Joint contact force, Acetabular forces
National Category
Orthopaedics
Identifiers
URN: urn:nbn:se:kth:diva-293406DOI: 10.1016/j.medengphy.2021.02.008ISI: 000634371100009PubMedID: 33781483Scopus ID: 2-s2.0-85102025957OAI: oai:DiVA.org:kth-293406DiVA, id: diva2:1546911
Note

QC 20210423

Available from: 2021-04-23 Created: 2021-04-23 Last updated: 2022-06-25Bibliographically approved

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Yadav, PritiPeña Fernández, MartaGutierrez-Farewik, Elena

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