American journal of industrial medicine · 2009
Pleural plaques in dentists from occupational asbestos exposure: a report of three cases.
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Sichletidis L, Spyratos D, Chloros D, Michailidis K, Fourkiotou I
Аннотация
BACKGROUND: White asbestos (chrysotile) has been used in dentistry since 1930 when it was introduced as a lining material for casting rings.
METHODS: All three patients presented with pleural plaques on chest X-rays as well as on CT-scans. They were working as dentists for 35-45 years. Under the instructions of the first dentist we represented precisely the whole process of manipulating a kind of paper that contained asbestos. In order to measure asbestos fibers concentration we used the membrane filter method and phase contrast optical microscopy. Dry asbestos sheets were scanned with x-ray diffraction and electron microscope.
RESULTS: Analysis of the filter demonstrated 0.008 fibers/cm(3) during the sampling period. X-ray diffraction analysis revealed that the material consisted of chrysotile exclusively. Electron microscope pictures confirmed the presence of chrysotile.
CONCLUSION: Everyday occupational exposure for many years even to low asbestos levels, under poor ventilation conditions in a closed space, could cause pleural lesions.
METHODS: All three patients presented with pleural plaques on chest X-rays as well as on CT-scans. They were working as dentists for 35-45 years. Under the instructions of the first dentist we represented precisely the whole process of manipulating a kind of paper that contained asbestos. In order to measure asbestos fibers concentration we used the membrane filter method and phase contrast optical microscopy. Dry asbestos sheets were scanned with x-ray diffraction and electron microscope.
RESULTS: Analysis of the filter demonstrated 0.008 fibers/cm(3) during the sampling period. X-ray diffraction analysis revealed that the material consisted of chrysotile exclusively. Electron microscope pictures confirmed the presence of chrysotile.
CONCLUSION: Everyday occupational exposure for many years even to low asbestos levels, under poor ventilation conditions in a closed space, could cause pleural lesions.
Предметные рубрики MeSH
AgedAged, 80 and overAsbestos, SerpentineAsbestosisCalcinosisCarcinoma, Squamous CellDental Casting TechniqueDentistsHumansLung NeoplasmsMaleMicroscopy, Electron, ScanningMicroscopy, Phase-ContrastOccupational DiseasesOccupational ExposurePleuraPulmonary Disease, Chronic ObstructiveTomography, X-Ray ComputedX-Ray Diffraction