Pneumoconiosis in Boiler Scalers
نویسندگان
چکیده
منابع مشابه
Pneumoconiosis in boiler scalers.
Every six months or so the majority of steamdriven ships spend a few days in docks having their boilers scaled and cleaned. In the larger docks there are men who are employed full time in this occupation, but elsewhere and in industry generally the cleaning is more often done as an occasional job. The total number of men engaged in the work full time is not large, but the occupation is a very d...
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Periodontal therapy aims at arresting periodontal infection and maintaining a healthy periodontium. The periodic mechanical removal of subgingival microbial biofilms is essential for controlling inflammatory periodontal disease. Mechanical periodontal therapy consists of scaling, root planing and gingival curettage. The sonic and ultrasonic scalers are valuable tools in the prevention of period...
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Biofilm and calculus removal are very important components of periodontal therapy, and a variety of instruments may be used for debridement purposes. In recent years, the application range of sonic and ultra sonic scalers in such debridement procedures has been extended to the subgingival area as slim instrument tips allowing good access to the root surfaces have been developed. Treatment using...
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Ultrasonic scalers are used in dentistry to remove calculus and other contaminants from teeth. One mechanism which may assist in the cleaning is cavitation generated in cooling water around the scaler. The vibratory motion of three designs of scaler tip in a water bath has been characterised by laser vibrometry, and compared with the spatial distribution of cavitation around the scaler tips obs...
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ژورنال
عنوان ژورنال: Occupational and Environmental Medicine
سال: 1951
ISSN: 1351-0711
DOI: 10.1136/oem.8.4.256