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Advances in Biomechanics & Applications
  Volume 1, Number 2, June 2014, pages 111-126
open access

Classification and visualization of primary trabecular bone in lumbar vertebrae
Khairul Salleh Basaruddin, Junya Omori, Naoki Takano and Takayoshi Nakano

    The microarchitecture of trabecular bone plays a significant role in mechanical strength due to its load-bearing capability. However, the complexity of trabecular microarchitecture hinders the evaluation of its morphological characteristics. We therefore propose a new classification method based on static multiscale theory and dynamic finite element method (FEM) analysis to visualize a three-dimensional (3D) trabecular network for investigating the influence of trabecular microarchitecture on load-bearing capability. This method is applied to human vertebral trabecular bone images obtained by micro-computed tomography (micro-CT) through which primary trabecular bone is successfully visualized and extracted from a highly complicated microarchitecture. The morphological features were then analyzed by viewing the percolation of load pathways in the primary trabecular bone by using the stress wave propagation method analyzed under impact loading. We demonstrate that the present method is effective for describing the morphology of trabecular bone and has the potential for morphometric measurement applications.
Key Words
    vertebra; trabecular network; morphology; image-based modeling; homogenization method; dynamic FEM
Khairul Salleh Basaruddin: School of Mechatronic Engineering, Universiti Malaysia Perlis, 02600 Pauh Putra, Perlis, Malaysia
Junya Omori: Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama, 223-8522, Japan
Naoki Takano: Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Yokohama, 223-8522, Japan
Takayoshi Nakano: Division of Materials and Manufacturing Science, Osaka University, 2-1,Suita, Osaka 565-0871, Japan

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