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. 2011 Dec;2(4):348-54.
doi: 10.5491/SHAW.2011.2.4.348. Epub 2011 Dec 5.

Noise exposure assessment in a dental school

Thitiworn Choosong  1 , Wandee Kaimook, Ratchada Tantisarasart, Puwanai Sooksamear, Satith Chayaphum, Chanon Kongkamol, Wisarut Srisintorn, Pitchaya Phakthongsuk
Affiliations

Noise exposure assessment in a dental school

Thitiworn Choosong et al. Saf Health Work. 2011 Dec.

Abstract

Objectives: This cross-sectional study was performed in the Dental School of Prince of Songkla University to ascertain noise exposure of dentists, dental assistants, and laboratory technicians. A noise spectral analysis was taken to illustrate the spectra of dental devices.

Methods: A noise evaluation was performed to measure the noise level at dental clinics and one dental laboratory from May to December 2010. Noise spectral data of dental devices were taken during dental practices at the dental services clinic and at the dental laboratory. A noise dosimeter was set following the Occupational Safety and Health Administration criteria and then attached to the subjects' collar to record personal noise dose exposure during working periods.

Results: The peaks of the noise spectrum of dental instruments were at 1,000, 4,000, and 8,000 Hz which depended on the type of instrument. The differences in working areas and job positions had an influence on the level of noise exposure (p < 0.01). Noise measurement in the personal hearing zone found that the laboratory technicians were exposed to the highest impulsive noise levels (137.1 dBC). The dentists and dental assistants who worked at a pedodontic clinic had the highest percent noise dose (4.60 ± 3.59%). In the working areas, the 8-hour time-weighted average of noise levels ranged between 49.7-58.1 dBA while the noisiest working area was the dental laboratory.

Conclusion: Dental personnel are exposed to noise intensities lower than occupational exposure limits. Therefore, these dental personnel may not experience a noise-induced hearing loss.

Keywords: Dental instruments; Dental practice; Dental school; Noise; Noise-induced hearing loss.

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Conflict of interest statement

No potential conflict of interest relevant to this article was reported.

Figures

Fig. 1
Fig. 1
Octave band analysis of each instrument during dental practices. (A) Noise frequency of heads of the grinder. (B) Noise frequency of micro motor. (C) Noise frequency of air-rotor handpiece. (D) Noise frequency of ultrasonic scaler. (E) Noise frequency of triple syringe or dental syringe. (F) Noise frequency of saliva suction.
See this image and copyright information in PMC

References

    1. Occupational Safety and Health Administration; US Department of Labor. Hearing Conservation (OSHA 3074-2002) Washington, DC: Occupational Safety and Health Administration; 2002. p. 25.
    1. Di Francesco RC, Sperandio FA, Ganzsanchez T, Bottino MA. Noise-induced hearing loss in dentists. Otolaryngol Head Neck Surg. 1997;117:210–211.
    1. Zubick HH, Tolentino AT, Boffa J. Hearing loss and the high speed dental handpiece. Am J Public Health. 1980;70:633–635. - PMC - PubMed
    1. Chowanadisai S, Kukiattrakoon B, Yapong B, Kedjarune U, Leggat PA. Occupational health problems of dentists in southern Thailand. Int Dent J. 2000;50:36–40. - PubMed
    1. Wilson CE, Vaidyanathan TK, Cinotti WR, Cohen SM, Wang SJ. Hearing-damage risk and communication interference in dental practice. J Dent Res. 1990;69:489–493. - PubMed

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