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Related Concept Videos

Electric Charges01:11

Electric Charges

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From lightning during thunderstorms to electronic devices, the phenomenon of electromagnetism is all around us. The electromagnetic force is one of the four fundamental forces of nature. It has been known to humanity in various forms for thousands of years. For example, the ancient Greek philosopher Thales of Miletus recorded his experiments on static electricity using amber and fur in the sixth century BC.
The English physicist William Gilbert studied the phenomenon of static electricity in...
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Sources and Properties of Electric Charge01:15

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All objects we see around us consist of atoms, which combine to form molecules. The lightest element in the universe is hydrogen, and a hydrogen atom consists of a positively charged proton and a negatively charged electron. The magnitude of charge that a proton and an electron carry are the same, and it is the fundamental unit of charge. In SI units, it is 1.602 times 10-19 coulomb.
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Electric Field of Two Equal and Opposite Charges01:30

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Atoms generally contain the same number of positively and negatively charged particles, protons, and electrons. Hence, they are electrically neutral. However, the centers of the positive and negative charges do not always coincide. In such a scenario, the electric field of an atom may not be zero.
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Electric Field of a Charged Disk01:23

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The simplest case of a surface charge distribution is the uniformly charged disk. Calculating its electric field also helps us calculate the electric field of a large plane of charge.
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Electric Field of a Continuous Line Charge01:19

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In physics, symmetry in a system means that something in the considered system remains unchanged due to a specific operation to which it is subjected. For example, consider a horizontal square. The square looks the same if its right and left sides are interchanged. Hence, it is symmetric under a right-left interchange.
In calculations of electric fields, symmetry is of great use. For example, while calculating electric fields of continuous charge distributions.
Consider a line element with a...
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Electric Potential Energy of Two Point Charges01:12

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The electric potential energy of a test charge in a uniform eclectic field can be generalized to any electric field produced by static charge distribution. Consider a positive test charge in an electric field produced by another static positive charge. If the test charge is moved away from the static charge, then the electric field does the positive work on the test charge, and the electric potential energy of the test charge decreases as it moves away from the static charge. Here the electric...
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Pilot In Vitro Study to Assess Cleaning Ability and Effects of Different Decontamination Methods on Implant Surfaces
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Enhanced osteoconductivity on electrically charged titanium implants treated by physicochemical surface modifications

Marc Fernández-Yagüe1, Roman Perez Antoñanzas2, Joan Josep Roa3

  • 1Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, Technical University of Catalonia (UPC), EEBE, Barcelona, Spain; CURAM, Centre for Medical Devices. National University of Ireland, Galway, Galway, Ireland.

Nanomedicine : Nanotechnology, Biology, and Medicine
|March 2, 2019
PubMed
Summary
This summary is machine-generated.

Bioactive titanium implant surfaces enhance bone repair and stability. Plasma (PL) and thermochemical (BIO) treatments significantly improve bone-implant contact and bone area ingrowth compared to non-bioactive surfaces.

Keywords:
Bone repairElectrical chargesFunctionalizationTitaniumTopographies

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Area of Science:

  • Orthopedic device technology
  • Biomaterials science
  • Tissue engineering

Background:

  • Biomimetic design is crucial for orthopedic implants.
  • Responsive surfaces promoting ion exchange can aid natural bone repair.
  • Current strategies focus on enhancing bone-implant integration.

Purpose of the Study:

  • To evaluate the osteoconductivity and mechanical stability of different nanostructured titanium implant surface treatments.
  • To compare the efficacy of non-bioactive (shot-blasting and acid-etching) versus bioactive (plasma and thermochemical) treatments.
  • To investigate the role of ionic surface-tissue exchange in orthopedic fixation.

Main Methods:

  • Titanium implants were treated using shot-blasting (SB), acid-etching (AE), plasma (PL), and thermochemical (BIO) processes.
  • Bone-implant contact (BIC) and total bone area (BAT) were assessed at 4 and 8 weeks post-implantation.
  • Functional mechanical stability was evaluated using resonance frequency analyses.

Main Results:

  • Bioactive PL and BIO surfaces showed significantly higher BIC (PL: 69-77%, BIO: 85-87%) compared to SB (46-47%) and AE (52-65%) implants.
  • Bioactive surfaces (PL and BIO) demonstrated enhanced bone area ingrowth (BAT: 56-59%) versus SB and AE (35%).
  • Functional mechanical stability was achieved earlier (4 weeks) with bioactive surfaces.

Conclusions:

  • Bioactive surface treatments (PL, BIO) significantly enhance osteoconductivity and bone-implant integration in orthopedic devices.
  • Ionic surface-tissue exchange is a key mechanism for improved implant performance.
  • Biomimetic, bioactive surfaces hold great promise for advanced orthopedic fixation strategies.