Measurement of Mercury Concentration in Saliva of Selected Sample of Children in relation to Amalgam Fillings


Background: Dental amalgam fillings interact in a complex way with the environment in the oral cavity as they aresubjected to chemical, biological, mechanical, and thermal forces. These forces change the restoration’sappearance and properties, causing metal ions, amalgam debris, non-metallic corrosion products, and mercuryreleased into the oral cavity. The aims of this study were Measure the concentration of mercury in saliva of children inrelation to the number of amalgam fillings before and after chewing and measure the continuous release of mercuryvapor from amalgam fillings in children and its relation to gender and age.Materials and methods: The sample consists of 51 children between 8-10 years of age and they were divided intothree groups according to the number of amalgam fillings they have in their teeth (1st group children didn't haveamalgam fillings in their teeth, 2nd group children had 1-2 amalgam fillings, 3rd group children had ≥3 amalgamfillings). Then saliva samples were collected from each child before and after chewing of sugar free chewing gum insterilized disposable cups.Results: The results indicated that minute amount of mercury were continuously released from amalgam restorationsand the release is accelerated after stimulation (chewing).Also the results demonstrated a positive correlationbetween the number of amalgam fillings and mercury concentration in saliva, mercury in saliva of children whodidn't have amalgam fillings in their teeth may come from other sources such as air, water and food. There was norelation between mercury concentration in saliva of children and the gender and age of children