Differences in the mean hearing threshold at 40 Hz in the left ear were statistically significant in the groups of workers with eleven to fifteen years of practical experience and twenty-one to twenty-five years of practical experience, respectively (Minervini, et al. According to this study, in a right-handed study participant, the ear on the left side is more vulnerable than the right side. The OAE test results revealed that in-ear of the left side, 84.5% of subjects passed and 15.5% of subjects struggled and were referred to an ear specialist, whereas in the right ear, 82.7% of subjects passed and 17.3% struggled and were referred to an ear specialist. The PTA results showed that the patient had mild hearing impairment overall, with the loss being more severe in the left ear than in the right. The whole procedure was carried out by an audiologist and an ENT specialist. Then an OAER (objective auditory evoked response) and PTA (clinical aurimeter) test were administered (Neurosoft, Russia). Otoscopic evaluation and the Weber test were used to establish if they had sensorineural or transmission hearing loss at 500 Hz, 1000 Hz, 2000 Hz, and 4000 Hz, respectively. Methodsįor this cross-sectional study, a total of 120 dental technicians were chosen. The aim of this study was to Evaluation of the effect of noise production in dental technology laboratory on dental technician hearing capacity. High sound pressure levels are also present in dental vibrators, polishing equipment, and sandblasters. Some of the noise-intensive processes in dental laboratories include the finishing of crowns, bridges, and removable partial dentures blowing out workpieces with steam and compressed air and deflating casting rings.
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