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Document ID (ISN)76113
CIS number 01-162
ISSN - Serial title 0002-8894 - American Industrial Hygiene Association Journal
Year 1999
Convention or series no.
Author(s) Nayebzadeh A., Dufresne A.
Title Evaluation of exposure to methyl methacrylate among dental laboratory technicians
Bibliographic information Sep.-Oct. 1999, Vol.60, No.5, p.625-628. 15 ref.
Abstract Following the diagnosis of two cases of occupational asthma among dental technicians, an industrial hygiene survey was conducted in two dental laboratories to determine time-weighted average and peak concentrations of methyl methacrylate vapour and time-weighted average concentration of acrylic dust. The time-weighted average concentrations of methyl methacrylate vapour were 0.7ppm and 1.6ppm and average peak concentrations were 9.3ppm and 9.7ppm for the first and second laboratory, respectively. The use of a local exhaust ventilation system was significant in reducing the peak concentration of methyl methacrylate vapour in the breathing zone of dental technicians. However, the local exhaust ventilation was not efficient in reducing the concentration of airborne acrylic dusts. Occupational exposure of dental technicians to dental materials, in particular to methyl methacrylate, requires further investigation. Local exhaust ventilation systems can reduce the concentration of methyl methacrylate in the dental laboratories to a significant extent if installed and used properly.
Descriptors (primary) polymethyl methacrylate; methyl methacrylate; dental services; respirable dust; exposure evaluation; volatile substances
Descriptors (secondary) personal sampling; comparative study; determination in air; ventilation
Document type D - Periodical articles
Country / State or ProvinceCanada
Subject(s) Medicine, hygiene and first aid
Broad subject area(s) Chemical safety
Browse category(ies) Exposure evaluation
Health care services