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KMID : 0377519930180030387
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Chung-Ang Journal of Medicine
1993 Volume.18 No. 3 p.387 ~ p.398
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The Contents of Nickel, Chromium and Cadmium in Indoor Air of Dental Laboratory and in Blood of Dental Technicians
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Abstract
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To evaluate some health hazards of dental technician by metal pollution, nickel, chromium and cadmium levels in indoor air of 8 laboratories and in whole blood of 69 male dental technicians were investigated. Six offices and 36 male
office-workers
were
studied as control group. Airborne metals were measured at breathing zone by personal air-sampling method. Collected samples were pretreated by wet digestion, and nickel, chromium were determined by flameless method using A.A. spectrophotometer,
Also,
the nickel, chromium and cadmium concentrations in whole blood were determined by A.A. spectrophotometer after simple dilution with distilled water.
The airborne nickel, chromium and cadmium contents were higher in dental laboratory than in office, and higher in polish section than in carving section of the dental laboratory. But all of the airborne metals were ranged within TLV(Threshold
Limit
Value). Blood nickel, chromium and cadmium levels in dental technician and office-worker were ranged within TLV. Mean blood nickel concentration was higher in dental technician than in office-worker, but was not significant difference between
polish and
carving section of dental technician. Blood nickel concentration of dental technician was correlated with occupational career(r=0.234, p<0.05) and increased according to occupational duration (F=2.90, p<0.05). blood chromium and cadmium
concentations
were not significant difference between dental technician and office-worker. Smoking increased only blood cadmium levels in office-worker.
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