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A Comparison Between Bearing and Non-bearing Human Bone: Mechanical Testing and Micro-Architecture Assessment

  • Xavier RoothaerEmail author
  • Rémi Delille
  • Hervé Morvan
  • Eric Markiewicz
  • Christian Fontaine
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

An adult skeleton has over 200 bones. Each bone has a specific function. These different functions bring different types of mechanical loadings. To ensure a healthy behavior of the bone, a throughout life process occurs on the micro-architecture of the cortical bone. This process highly depends on the stress applied on the bone. The micro-architecture is able to supply blood and nutrients into the bone matrix and acts on the bone remodeling process. The architecture is formed by vascular canals where the orientation depends on the main axis of the mechanical loading. Vascular canals of the cortical bone located in long bone diaphysis are mainly oriented along the longitudinal axis of the diaphysis. Moreover, the canal network is tortuous and several geometrical features should affect the macroscopic behavior of the bone. The novelty of this work is to use a method which accurately describes the vascular architecture of the cortical bone based on micro-computed tomography and to correlate these results with the macroscopic mechanical behavior of the cortical bone. This experimental study is based on the extraction of cortical bone samples from four cadaveric human subjects. For each human subject, left and right humeri and femurs are studied. Dumbbell-shaped bone specimens are prepared from each bone. Care was taken to preserve bone properties after extraction: a maximum of 15 days was fixed between the extraction and the mechanical testing. Samples were constantly kept hydrated and stored at 4 °C in order to avoid frost/defrost cycles. Specimens are scanned and subsequently mechanically loaded to failure. Results will show the impact of the laterality of the bone on the architecture, the impact of loading on the bone on the architecture by comparing humeral and femoral samples for each human subject and finally the impact of the architecture on the mechanical behavior of the bone.

Keywords

Cortical bone Architecture Tensile test Bearing bone Haversian canals 

Notes

Acknowledgements

This research is funded by the French Ministry of Higher Education and Research and is carried out within the framework of the CNRS Research Federation on Ground Transports and Mobility, in articulation with the ELSAT2020 project supported by the European Community, the Hauts de France Regional Council. The authors gratefully acknowledge the support of these institutions.

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Copyright information

© Society for Experimental Mechanics, Inc. 2020

Authors and Affiliations

  • Xavier Roothaer
    • 1
    Email author
  • Rémi Delille
    • 1
  • Hervé Morvan
    • 1
  • Eric Markiewicz
    • 1
  • Christian Fontaine
    • 2
  1. 1.CNRS, UMR 8201, LAMIHUniversity Polytechnique Hauts-de-FranceValenciennesFrance
  2. 2.Department of Anatomy, Faculty of MedicineUniversity of Lille 2Lille CedexFrance

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