[Effects of new dental amalgam fillings in pregnancy on Hg concentration in mother and child. With consideration for possible interactions between amalgam and precious metals].

Amalgam-tooth fillings are suspected to be cause of many different diseases. With special consideration of the problem of newly made fillings, blood samples were taken from 45 affected pregnant women. After birth, newborns and placenta tissue were tested for Hg-contamination. One hundred and twenty one women with older amalgam-fillings were compared to 19 women without amalgam-fillings. The surfaces of the amalgam-fillings were measured in each case in mm2. In 58 women the tooth fillings contained additional precious metal. While in the placentas a retaining function were found of up to ten times higher Hg-values but low correlations to the amalgam surfaces, the Hg-concentrations in the blood samples of mother and child did not correlate to the amalgam-fillings. Newly made fillings during pregnancy had no influence on the Hg-concentration, neither had the contact to precious metals in the approximal and the antagonistic range. The wide-spreading of Hg-values without correlation to the filling-surfaces speaks for a great influence of other environmental factors.