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Hazards in Modern Dentistry[edit]
Long term occupational noise exposure can contribute to permanent hearing loss, which is referred to as noise-induced hearing loss (NIHL) and tinnitus. Noise exposure can cause excessive stimulation of the hearing mechanism, which damages the delicate structures of the inner ear[1]. NIHL can occur when an individual is exposed to sound levels above 90 dBA according to the Occupational Safety and Health Administration, or OSHA. Regulations state that the permissible noise exposure levels for individuals is 90 dBA[2]. For the National Institute for Occupational Safety and Health (NIOSH), exposure limits are set to 85 dBA. Exposures below 85 dBA are not considered to be hazardous. Time limits are placed on how long an individual can stay in an environment above 85 dBA before it causes hearing loss. OSHA places that limitation at 8 hours for 85 dBA. The exposure time becomes shorter as the dBA level increases.
Within the field of dentistry, a variety of cleaning tools are used including piezoelectric and sonic scalers, and ultra sonic scalers and cleaners[3]. While a majority of the tools do not exceed 75 dBA[4], prolonged exposure over many years can lead to hearing loss or complaints of tinnitus[5]. Few dentists have reported using personal hearing protective devices[6][7], which could offset any potential hearing loss or tinnitus.
- ^ "Noise-Induced Hearing Loss". NIDCD. 18 August 2015.
- ^ "Occupational Safety and Health Standards | Occupational Safety and Health Administration". www.osha.gov.
- ^ Stevens, M (1999). "Is someone listening to the din of occupational noise exposure in dentistry". RDH (19): 34–85.
- ^ Merrel, HB (1992). "Noise pollution and hearing loss in the dental office". Dental Assisting Journal. 61 (3): 6–9.
- ^ Wilson, J.D. (2002). "Effects of occupational ultrasonic noise exposure on hearing of dental hygienists: A pilot study". Journal of Dental Hygiene. 76 (4): 262–269.
- ^ Leggat, P.A. (2007). "Occupational Health Problems in Modern Dentistry: A Review". Industrial Health. 45 (5): 611–621. doi:10.2486/indhealth.45.611.
- ^ Leggat, P.A. (2001). "Occupational hygiene practices of dentists in southern Thailand". International Dentistry Journal (51).