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Subjects, Materials and Methods: This study was done in Al-Daura oil refinery; samples consist of 60 workers involved in refinery processes (study group) and 20 non-workers (control group). Oral examination and saliva collection was done to assess the oral findings and measurement the level of heavy metals (lead and cadmium), oxidative status (MDA and SOD) and secretary IgA.
Results: salivary lead and cadmium was higher in study group (6.34 Âµg/dl and 0.56 Âµg/l) than that of control group (3.3 Âµg/dl and 0.34 Âµg/l) with highly significant difference (p<0.001). A significant increase (p<0.05) was found in salivary MDA (15.3 ng/ml) and salivary sIgA (464.36 Âµg/ml) and significant decrease in salivary SOD (1895.1 pg/ml) among the study group. Lead has shown significant linear correlation with MDA and IgA. A significant reverse correlation was found between heavy metals (lead and cadmium) and SOD. The oral examination revealed no oral lesions of interest.
Conclusion: Workers in Al- Daura oil refinery exposed to pollution with heavy metals (Pb and Cd) which was associated with changes in the biochemical and immunological findings among the oral cavity.
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