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Related Experiment Videos

Microdamage and osteocyte-lacuna strain in bone: a microstructural finite element analysis

P J Prendergast1, R Huiskes

  • 1Institute of Orthopaedics, University of Nijmegen, The Netherlands.

Journal of Biomechanical Engineering
|May 1, 1996
PubMed
Summary

Bone microdamage accumulation may trigger adaptive bone remodeling. This study suggests that microdamage alters strains around osteocytes, potentially initiating the bone remodeling process.

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Area of Science:

  • Biomechanics
  • Cell Biology
  • Materials Science

Background:

  • Bone damage accumulation exceeds repair, leading to stress fractures at high loading rates.
  • Lower loading rates allow adaptive bone remodeling, but the link between microdamage and remodeling is unclear.
  • Osteocytes are hypothesized to sense strain and mediate bone remodeling.

Purpose of the Study:

  • To investigate if bone microdamage generates strains that trigger bone remodeling.
  • To determine if accumulated damage leads to adaptive bone remodeling.
  • To explore the relationship between microdamage and osteocyte-mediated remodeling.

Main Methods:

  • Finite element analysis was used to model Haversian bone.
  • Individual lamellae and osteocyte-lacunae were included in a generalized plane strain model.

Related Experiment Videos

  • The effect of microdamage on strain distribution around osteocytes was analyzed.

    • Main Results:

    • Microdamage was predicted to alter local deformation around osteocyte-lacunae.
    • These alterations in strain were found to increase with accumulating microdamage.
    • Results support the hypothesis that microdamage influences strain sensing by osteocytes.

    Conclusions:

    • Accumulated bone microdamage can be sensed as altered strains at the microstructural level.
    • This mechanism provides theoretical support for the observed correlation between microdamage and the initiation of bone resorption.
    • Findings suggest a direct link between microdamage and the initiation of bone remodeling processes.