[Dental caries, periodontal diseases and the condition of mouth mucosa in workers of the petrochemical industry].

259 workers of the divisions of the highest toxic substances risk in the working environment were examined. The masticatory system was examined clinically. The examinations indicated considerable caries in all workers. The intensity of the disease differed insignificantly between workers of particular divisions. Peridontal disorders were found in almost all workers (over 80% of subjects). The highest rate of those disorders was that in the workers of the Divisions of Furfural and Asphalt Oxidation. The periodontal disorders were fairly advanced. In most (over 60%) cases the destructive periodontal disease was diagnosed. Among the diseases of oral mucosa, leukoplakia was most frequent, affecting 42.8% of workers of Divisions of Furfural and 26.0% of workers of the Division Phenol.