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Influence of stress and pure tone audiometry on noise-exposed dental laboratory technicians by dental instrument
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  • Journal title : Journal of Digital Convergence
  • Volume 14, Issue 4,  2016, pp.363-370
  • Publisher : The Society of Digital Policy and Management
  • DOI : 10.14400/JDC.2016.14.4.363
 Title & Authors
Influence of stress and pure tone audiometry on noise-exposed dental laboratory technicians by dental instrument
Yon, Jung-Min; Lee, Ju-Hee; Kim, Dae-Hyun; Lee, Og-Kyoung;
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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.
Noise;Dental laboratory technology;Stress;Hearing loss;Heart rate variability;Pure tone audiometry;
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