[Effects of chemical occupational environmental factors on the prevalence of damage to the teeth, mouth and jaw of exposed workers].

320 workers exposed to chemicals 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 DMF/T-Index, Oral-Hygiene-Index (Quigley/Hein) and the Parodontopathy-Index according to Kötzschke. The result 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.