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Related Concept Videos

Bone Remodeling01:40

Bone Remodeling

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

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Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
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In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
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Osteoclasts in Bone Remodeling01:31

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Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
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Normal strain under axial loading is an important concept in the field of mechanics of materials. Axial loading implies the application of a force along the axis of a material, like a column or bar. This force can either compress or stretch the material. In the context of axial loading, normal strain is the deformation experienced by the material in the direction of the loading force. It's calculated as the change in length divided by the original length of the material. This unitless ratio...
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A Lab-On-A-Chip Platform for Stimulating Osteocyte Mechanotransduction and Analyzing Functional Outcomes of Bone Remodeling
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Bone Remodeling Process Based on Hydrostatic and Deviatoric Strain Mechano-Sensing.

Natalia Branecka1, Mustafa Erden Yildizdag2,3, Alessandro Ciallella2,4

  • 1Faculty of Mechanical and Industrial Engineering, Warsaw University of Technology, 00-661 Warsaw, Poland.

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Summary
This summary is machine-generated.

This study introduces a simplified continuum model for bone remodeling, showing that key material properties like bulk and shear moduli can adapt independently to environmental changes, offering new modeling possibilities.

Keywords:
bone remodelingdeviatoric strainhydrostatic strainmechanical stimulimechano-sensingstrain energy density

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Area of Science:

  • Biomechanics
  • Materials Science
  • Computational Modeling

Background:

  • Bone tissue exhibits complex remodeling in response to mechanical and environmental stimuli.
  • Existing models often simplify the adaptive mechanisms of bone material properties.
  • Understanding bone adaptation is crucial for treating skeletal diseases and designing implants.

Purpose of the Study:

  • To propose a simplified macroscopic continuum model for bone tissue remodeling.
  • To investigate the independent evolution of bone's bulk and shear moduli.
  • To provide a preliminary framework for more comprehensive bone modeling.

Main Methods:

  • Development of a macroscopic continuum model.
  • Independent evolution of bulk and shear moduli based on energetic principles.
  • Numerical simulations to test the model's predictive capabilities.

Main Results:

  • The model successfully predicts bone remodeling by allowing independent adaptation of multiple material parameters.
  • Demonstrated the feasibility of modeling distinct evolutions for bulk and shear moduli.
  • The simplified approach provides a foundation for more complex bone remodeling simulations.

Conclusions:

  • A simplified continuum model can effectively capture aspects of bone remodeling.
  • Independent adaptation of stiffness parameters is a viable approach for modeling bone's functional adaptation.
  • Further research is warranted to refine and expand this modeling framework.