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Methods of Sterilization I: Physical Methods01:29

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As used in a healthcare facility, sterilization destroys all microorganisms through physical or chemical methods. The physical method includes steam, dry heat, boiling water, and radiation.
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Radiation and filtration are essential tools for microbial control, targeting microorganisms through distinct mechanisms. Radiation eliminates microbes by damaging their DNA, either killing them or inhibiting their growth. Based on wavelength, radiation is classified into two types: nonionizing and ionizing radiation.Non-ionizing radiation, such as UV radiation (200–400 nm), is absorbed by DNA, causing defects that effectively disinfect surfaces, air, and water, including safety cabinets.
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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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Decontamination of titanium implants using physical methods.

Ashwaq A Al-Hashedi1,2, Marco Laurenti3, Veronique Benhamou1

  • 1Faculty of Dentistry, McGill University, Montreal, QC, Canada.

Clinical Oral Implants Research
|July 10, 2016
PubMed
Summary
This summary is machine-generated.

Titanium implant decontamination remains challenging. Titanium brushes removed more contaminants and bacteria than other methods, but complete surface restoration was not achieved. Er:YAG laser effectively killed biofilm bacteria.

Keywords:
biomaterialslaserperiodontologysurface chemistry

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Area of Science:

  • Biomaterials science
  • Dental implantology
  • Surface chemistry

Background:

  • Titanium (Ti) implants are crucial for dental restorations.
  • Current decontamination methods often fail to fully restore implant surfaces for re-osseointegration.
  • Biofilm contamination poses a significant challenge to implant success.

Purpose of the Study:

  • To evaluate four clinical decontamination methods for biofilm-contaminated titanium implant surfaces.
  • To assess the impact of these methods on surface chemistry and bacterial load.
  • To identify effective strategies for improving titanium implant surface decontamination.

Main Methods:

  • Assessed metal curettes, plastic curettes, Ti brushes, and Er:YAG laser on machined Ti discs.
  • Analyzed surface morphology and chemical composition using SEM and XPS.
  • Evaluated bacterial presence and viability with live-dead assays.

Main Results:

  • Biofilm contamination formed a persistent organic layer on Ti surfaces.
  • Ti brushes showed superior removal of organic contaminants and bacteria compared to curettes and Er:YAG laser.
  • No method fully restored the original surface chemistry of the titanium implants.
  • Er:YAG laser treatment resulted in the lowest live-to-dead bacterial ratio.

Conclusions:

  • Ti brushes offer better decontamination of Ti implant surfaces than curettes or Er:YAG laser.
  • Complete elimination of surface contamination was not achieved by any tested method.
  • Er:YAG laser demonstrated superior efficacy in killing biofilm bacteria on Ti surfaces.