[Prevalence of damages of dental, the oral and the jaw areas among workers exposed to substances in a chemical company].

320 workers exposed to chemical in a large petrol-company and 100 nonexposed workers under the nearly same conditions of work and life were examined on damages of their dental, oral and jaw areas. As criterias of the examinations were used DMG/T-Index, Oral Hygiene-Index (Quigley/Hein, Greene/Vermillion) and the Parodontopathy-Index according to Kötzschke. The results of the examinations was a higher prevalence of damages of the periodontium among the workers in the chemical company in comparison to the control group. Within the several groups of workers exposed to chemicals were found significantly differences of the damages depending of exposures.