Dental drill noise and hearing conservation.
D003754:Dental High-Speed Equipment; D004430:Ear Protective Devices; D006317:Hearing Loss, Noise-Induced / Q000473:pathology / Q000517:prevention & control*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009622:Noise / Q000009:adverse effects*; D009623:Noise, Occupational / Q000009:adverse effects*