Lead in primary teeth from Norway : changes in lead levels from the 1970s to the 1990s.
Lead is one of the most important and widely distributed pollutants in the environment.
In the human population children are particularly at risk.
Local dentists in all 19 counties in Norway collected 2746 primary teeth from 1990 to 1994.
Tooth substance from whole, ground teeth were analysed for lead concentration by electrothermal atomic absorption spectrophotometry.
The geometrical mean for the entire material was 1.27 mug lead/g tooth substance (S.D. 1.87). the mean lead levels in each of the counties were significantly lower than those obtained in a corresponding study in the 1970s.
Two counties, Oslo ans Vest-Agder, had significantly higher lead levels than the majority of the other counties.
Tooth lead levels and atmospheric deposition of lead in the same areas were significantly and positively correlated, as shown by analysis of naturally growin moss.
We conclude that lead concentrations in primary teeth from children in Norway have been reduced by approx. 50% from the 1970s to the 1990s.
The reduction probably reflects a decrease in the environmental lead burden in Norway.
Mots-clés Pascal : Plomb, Métal lourd, Polluant, Environnement, Taux, Dent temporaire, Enfant, Homme, Epidémiologie, Norvège, Europe, Etude longitudinale, Réduction
Mots-clés Pascal anglais : Lead, Heavy metal, Pollutant, Environment, Rate, Deciduous tooth, Child, Human, Epidemiology, Norway, Europe, Follow up study, Reduction
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0149006
Code Inist : 002B03M01. Création : 21/07/1998.