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Contaminated dental instruments.

A Smith1, M Dickson, J Aitken

  • 1Infection Research Group, Glasgow Dental Hospital & School, 378 Sauchiehall Street, Glasgow, UK. a.smith@dental.gla.ac.uk

The Journal of Hospital Infection
|July 30, 2002
PubMed
Summary
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Visible contamination remains on many dental endodontic files after cleaning. This highlights concerns regarding prion transmission via surgical instruments and suggests current decontamination methods may be insufficient.

Area of Science:

  • Dentistry
  • Microbiology
  • Infectious Diseases

Background:

  • Concerns exist in the UK regarding prion transmission via surgical instruments.
  • Endodontic files, used in dentistry, pose a risk due to their proximity to the trigeminal nerve.

Purpose of the Study:

  • To visually assess the effectiveness of decontamination on used endodontic files.
  • To compare contamination levels between instruments from general dental practices and a dental hospital.

Main Methods:

  • Visual assessment using dissecting light microscopy and scanning electron microscopy.
  • Analysis of endodontic files after clinical use and decontamination procedures.

Main Results:

  • 76% of files from general dental practices showed visible contamination.

Related Experiment Videos

  • 14% of files from a dental hospital remained visibly contaminated.
  • Current decontamination methods may not fully remove biological material.

    • Conclusions:

    • Existing decontamination protocols for endodontic instruments may be inadequate.
    • Improved cleaning techniques and single-use endodontic files warrant further investigation to prevent prion transmission.