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Mechanic stress generated by a time-varying electromagnetic field on bone surface
1Department of Biology, Quinlan Life Sciences Education and Research Center, Loyola University Chicago, 1032 W. Sheridan Rd, Chicago, IL, 60660, USA. hye1@luc.edu.
Medical & Biological Engineering & Computing
|March 21, 2018
Summary
Electromagnetic stimulation generates mechanical stresses on bone surfaces, influencing bone healing. Shear stress is significantly greater than compressive stress, offering potential for targeted fracture repair therapies.
Area of Science:
- Biomedical Engineering
- Mechanobiology
- Bone Physiology
Background:
- Bone cells respond to mechanical stimuli, crucial for growth and repair.
- Fracture impairs normal bone mechanotransduction.
- Electromagnetic stimulation (EMS) aids bone healing, but mechanisms are unclear.
Purpose of the Study:
- To quantitatively analyze biomechanical changes in bone under EMS.
- To investigate the generation of mechanical stresses on bone surfaces due to EMS.
- To explore the potential of EMS for enhancing fracture healing through biomechanical influence.
Main Methods:
- Utilized a computational muscle/bone model to simulate EMS effects.
- Calculated compressing and shear stresses on the bone surface.
- Performed parametric analysis on geometric, electrical, and field parameters.
Main Results:
- Time-varying magnetic fields induce both compressing and shear stresses at the muscle/bone interface.
- Shear stress was found to be significantly greater than compressing stress.
- Calculated stresses depend on muscle/bone properties, coil orientation, and magnetic field frequency.
Conclusions:
- EMS can induce biomechanical changes on bone surfaces, particularly shear stress.
- These stresses may influence cellular mechanotransduction, aiding fracture healing.
- Controllable EMS parameters offer potential for targeted therapeutic interventions in bone repair.
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