Numerical study of 10-year-old child forearm injury

  • Mao, Haojie (Department of Biomedical Engineering, Wayne State University) ;
  • Cai, Yun (Department of Biomedical Engineering, Wayne State University) ;
  • Yang, King H. (Department of Biomedical Engineering, Wayne State University)
  • Received : 2013.09.05
  • Accepted : 2014.06.23
  • Published : 2014.09.25


Forearm fractures in children are very common among all pediatric fractures. However, biomechanical investigations on the pediatric forearm are rather scarce, partially due to the complex anatomy, closely situated, interrelated structures, highly dynamic movement patterns, and lack of appropriate tools. The purpose of this study is to develop a computational tool for child forearm investigation and characterize the mechanical responses of a backward fall using the computational model. A three-dimensional 10-year-old child forearm finite element (FE) model, which includes the ulna, radius, carpal bones, metacarpals, phalanges, cartilages and ligaments, was developed. The high-quality hexahedral FE meshes were created using a multi-block approach to ensure computational accuracy. The material properties of the FE model were obtained by scaling reported adult experimental data. The design of computational experiments was performed to investigate material sensitivity and the effects of relevant parameters in backward fall. Numerical results provided a spectrum of child forearm responses with various effective masses and forearm angles. In addition, a conceptual L-shape wrist guard design was simulated and found to be able to reduce child distal radius fracture.



Supported by : Toyota's Collaborative Safety Research Center (CSRC)


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