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Journal of Clinical Microbiology
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Concerned with microbiological aspects of human and animal infections and infestations.
Coverage includes bacteria, viruses, rickettsiae,
chlamydiae, yeasts and fungi, mycrobacteria, aerobic actinomycetes, and parasites.
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Cross infection risks associated with current procedures for using high speed dental handpieces.
J Clin Microbiol. 1992 February; 30(2): 401–406.
by D L Lewis and R K Boe
When a dye solution used to simulate patient material was either injected into high-speed
dental handpiece (drill) waterlines
or applied to the equipment externally, internal air turbine chambers became contaminated.
These chambers served as a reservoir of the material, which was slowly dislodged by air
expelled during subsequent handpiece operation and which was diluted by water spray
used for cooling the drilling surface. Considering the fact that patient materials
could reside in internal parts of the equipment that are not usually disinfected
and that the material may be subsequently sprayed into cuts and abrasions in the oral cavity, the common approach to reprocessing handpieces (external wiping in combination with flushing) may pose unacceptably high risks to those individuals treated soon after infected patients. Therefore, unless reliable data on cross-infection frequencies are obtained and prove it unnecessary, heat-treating high-speed handpieces between each patient should be considered an essential component of standard procedures whenever universal precautions are practiced in dentistry.
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Dental Handpiece Maintenance
by Charles Bowen
Handpieces Defined, why they fail, maintenance that works. Proper sterilization and
infection control is also covered.
Rebuild & replacement tips and tricks, staff training, government regulations and finding
the right repair shop are subjects also discussed. Good science for the dental professional.
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