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http://dx.doi.org/10.14400/JDC.2016.14.4.363

Influence of stress and pure tone audiometry on noise-exposed dental laboratory technicians by dental instrument  

Yon, Jung-Min (Research Institute of Veterinary Medicine, Chungbuk National University)
Lee, Ju-Hee (Dept. of Dental Laboratory Technology, Daejeon Health Sciences College)
Kim, Dae-Hyun (Dept. of Epidemiology and Health Promotion, Graduate School of Public Health, Yonsei University)
Lee, Og-Kyoung (Dept. of Clinical Laboratory Science, Daejeon Health Sciences College)
Publication Information
Journal of Digital Convergence / v.14, no.4, 2016 , pp. 363-370 More about this Journal
Abstract
Noise is unwanted sound that is the reason of the stress and hearing loss. The current study attempted to estimate whether the noise of dental laboratory affected stress and pure tone audiometry (PTA) of dental laboratory technicians (DLTs) using heart rate variability, air and bone conduction audiometry. The age, heights, and weights of DLTs were resembled control. Standard deviation of normal to normal interval such as stress resistance and normalized HF of DLTs were significantly decreased, but heart rates, normalized LF, and LF/HF ratio of DLTs were significantly increased compared with control. In air conduction audiometry of DLTs, significant increments of thresholds encountered in 125, 250, 500, 1000, 2000, 3000, 4000, and 6000 Hz in the right ears and 125, 250, 500, 1000, and 2000 Hz in the left ears. Thresholds of bone conduction audiometry in both ears were significantly increased in 250, 500, 1000, 2000, and 4000 Hz. The findings in this study provide that stress and hearing loss observed in noise-exposed DLTs at dental laboratory. Therefore, proper safety precautions should be carried out at dental laboratory.
Keywords
Noise; Dental laboratory technology; Stress; Hearing loss; Heart rate variability; Pure tone audiometry;
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Times Cited By KSCI : 6  (Citation Analysis)
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