Influence of muscle groups’ activation on proximal femoral growth tendencyReport as inadecuate

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Biomechanics and Modeling in Mechanobiology

pp 1–15

First Online: 22 June 2017Received: 29 August 2016Accepted: 06 June 2017DOI: 10.1007-s10237-017-0925-3

Cite this article as: Yadav, P., Shefelbine, S.J., Pontén, E. et al. Biomech Model Mechanobiol 2017. doi:10.1007-s10237-017-0925-3


Muscle and joint contact force influence stresses at the proximal growth plate of the femur and thus bone growth, affecting the neck shaft angle NSA and femoral anteversion FA. This study aims to illustrate how different muscle groups’ activation during gait affects NSA and FA development in able-bodied children. Subject-specific femur models were developed for three able-bodied children ages 6, 7, and 11 years using magnetic resonance images. Contributions of different muscle groups—hip flexors, hip extensors, hip adductors, hip abductors, and knee extensors—to overall hip contact force were computed. Specific growth rate for the growth plate was computed, and the growth was simulated in the principal stress direction at each element in the growth front. The predicted growth indicated decreased NSA and FA of about \0.1 {^{\circ }}\ over a four-month period for able-bodied children. Hip abductors contributed the most, and hip adductors, the least, to growth rate. All muscles groups contributed to a decrease in predicted NSA \\sim \0.01\{^{\circ }}\–0.04\{^{\circ }}\ and FA \\sim \0.004\{^{\circ }}\–\0.2{^{\circ }}\, except hip extensors and hip adductors, which showed a tendency to increase the FA \\sim \0.004\{^{\circ }}\–\0.02{^{\circ }}\. Understanding influences of different muscle groups on long bone growth tendency can help in treatment planning for growing children with affected gait.

KeywordsBone tissue modeling Deformity development Biomechanics Individualized Finite element analysis Osteogenic index Electronic supplementary materialThe online version of this article doi:10.1007-s10237-017-0925-3 contains supplementary material, which is available to authorized users.

Author: Priti Yadav - Sandra J. Shefelbine - Eva Pontén - Elena M. Gutierrez-Farewik


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