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Electric fields generated by static charges, often referred to as electrostatic fields, are characteristically different from electric fields created by time-varying magnetic fields. While the former is a conservative field, implying that no net work is done on a test charge if it goes around in a complete loop in the field, the latter is, by definition, not a conservative field; net work is done, and it is proportional to the rate of change of magnetic flux.
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Electromagnetic waves are categorized according to their wavelengths and frequencies, giving the electromagnetic spectrum. These waves are classified as radio, infrared, ultraviolet, etc. Radio waves refer to electromagnetic radiation with wavelengths ranging from millimeters to kilometers. Radio waves are commonly used for audio communications (i.e., radios) and typically result from an alternating current in the wires of a broadcast antenna. They cover a broad wavelength range and are used...
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James Clerk Maxwell formulated a single theory combining all the electric and magnetic effects scientists knew during that time, calling the phenomena his theory predicted “Electromagnetic waves”. He brought together all the work that had been done by brilliant physicists such as Oersted, Coulomb, Gauss, and Faraday and added his own insights to develop the overarching theory of electromagnetism. Maxwell’s equations, combined with the Lorentz force law, encompass all the laws...
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The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
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Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.
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A comprehensive overview on utilizing electromagnetic fields in bone regenerative medicine.

Esmaeel Azadian1,2, Bahar Arjmand1,2, Zohreh Khodaii3,4

  • 1a Urogenital Stem Cell Research Center , Shahid Beheshti University of Medical Sciences , Tehran , Iran.

Electromagnetic Biology and Medicine
|January 22, 2019
PubMed
Summary

Extremely low-frequency electromagnetic fields (ELF-EMFs) show promise in promoting stem cell osteogenic differentiation for bone tissue engineering. This review analyzes 39 studies, highlighting ELF-EMFs as a key physical stimulus for bone repair strategies.

Keywords:
Bone tissue engineeringelectromagnetic fieldsextremely low-frequency electromagnetic fieldsosteogenesisstem cells

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Area of Science:

  • Biomedical Engineering
  • Regenerative Medicine
  • Stem Cell Biology

Background:

  • Stem cells are crucial for bone tissue engineering and bone lesion repair.
  • Osteogenic differentiation is influenced by various biological, chemical, physiological, and physical factors.
  • Extremely low-frequency electromagnetic fields (ELF-EMFs) are recognized as a physical stimulus with potential to enhance osteogenic differentiation.

Purpose of the Study:

  • To review current research on the effects of electromagnetic fields (EMFs) on stem cells within bone tissue engineering.
  • To consolidate and analyze findings from studies investigating EMFs for bone regeneration.
  • To identify knowledge gaps in the application of EMFs for bone tissue engineering.

Main Methods:

  • Systematic review and analysis of 39 relevant scientific articles.
  • Tabulation of scattered data from selected studies for ease of access.
  • Synthesis of information to provide an overview of the field.

Main Results:

  • Evidence suggests ELF-EMFs can promote osteogenic differentiation in various cell types.
  • The application of EMFs is a growing area of research in bone tissue engineering.
  • A significant body of research exists on EMFs' impact on stem cells for bone repair.

Conclusions:

  • ELF-EMFs represent a promising physical stimulus for enhancing stem cell differentiation in bone tissue engineering.
  • Further research is needed to fully elucidate the mechanisms and optimize the application of EMFs.
  • This review provides a foundation for future studies and highlights areas requiring further investigation.