[Noise level in dental laboratory practice].

PURPOSE

Dental technicians are exposed to different noises. The aim of this study was to determine the noise level produced by different dental laboratory handpieces and special equipments in one dental lab.

METHODS

The noise level produced by two dental laboratory handpieces(Kavo K9, NSK Vmax) was measured at distance of 15cm, 30cm and 45cm in free-running and different working conditions. Additionally, the noise level produced by some dental laboratory equipments and procedures were also measured both near the technician's ear and 1.5 meters away. The noise level was determined using a precious sound level meter.

RESULTS

The mean value of noise level of the two dental laboratory handpieces measured at all distances and in all conditions was between 61 to 83 dB. The noise level produced by some dental laboratory equipments were much higher, with high-speed metal cutting, steam cleaning and power pillo trimmer exceeding 90dB. Noise level inside the denture fabrication room was between 65 to 83 dB.

CONCLUSIONS

The noise level in the dental laboratory is considered to be a potential risk causing hearing loss. Regular audiometry checking up should be carried out among the dental technicians and ear protectors must be used during work.