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Characteristics of Blood Containing Aerosols Generated by Common
Powered Dental Instruments
A study was conducted on the characteristics of blood containing
aerosols generated by powered dental instruments. Rates of aerosol
production, particle size distribution, particle halflife, and
particle blood content were determined in aerosols generated by a
dental syringe, an air turbine handpiece, and an air driven, slow
speed handpiece during activities simulating intraoral procedures.
Aerosols of smaller particle size were consistently generated from
the syringe and the turbine water spray handpiece compared with
those generated by the slow speed handpiece. Up to 83% of the 0.06
to 2.5 sized micron aerosol particles passed through the filters of
nine different kinds of surgical masks commonly used by dental
professionals. The author concludes that the data support an
airborne route for possible hepatitis-B infection for dental
professionals.
American Industrial Hygiene Association Journal,
56(7):670-676, 1995
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